CN101651732B - Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method - Google Patents

Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method Download PDF

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Publication number
CN101651732B
CN101651732B CN 200910166410 CN200910166410A CN101651732B CN 101651732 B CN101651732 B CN 101651732B CN 200910166410 CN200910166410 CN 200910166410 CN 200910166410 A CN200910166410 A CN 200910166410A CN 101651732 B CN101651732 B CN 101651732B
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loud speaker
audio signal
user
microphone
hand
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CN101651732A (en
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横田哲平
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Sony Corp
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Sony Corp
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  • Circuit For Audible Band Transducer (AREA)
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  • Stereophonic Arrangements (AREA)
  • Telephone Function (AREA)

Abstract

A handsfree call apparatus includes: a speaker held in the vicinity of a user's ear by a holding unit with a speaker unit thereof not being attached to a baffle board so as to mix sounds emitted from the front and back of a diaphragm thereof; a microphone, which is provided to a region where sounds emitted from the front and back of the diaphragm of the speaker are mixed and canceled out, configured to collect the call voice of the user; an output unit configured to output a call voice signal of the user from the microphone to transmit this to a call partner; and an input unit configured to receive a call voice signal from the call partner to supply this to the speaker.

Description

Handless unit and method and have the apparatus, acoustic reproducing of hand-free call function
Technical field
The present invention relates to enable Handless unit, apparatus, acoustic reproducing and the hand-free call method of hand-free conversation with hand-free call function.
Background technology
Proposed Handless unit, the user can grip telephone receiver and carry out conversation thus.Especially, for driving safety, also proposed hands-free device in the car, the driver can carry out the hand-free conversation thus.
About hands-free device in this car, for example, as shown in Figure 1, hands-free device in a kind of like this car has been proposed, wherein, the microphone 102 that is used to send calling party (being the driver in this case) 101 is attached the sunshading board 103 in the inboard of the front glass that is arranged on vehicle.In this case, installing in the car under the situation of audio playing apparatus, the loud speaker that is used for the acoustic reproduction of the audio frequency that audio playing apparatus is play in its car can be used for the acoustic reproduction of recipient's audio frequency.
As shown in Figure 1, for example, be used for the sound that audio playing apparatus is play in the car acoustic reproduction driver seat, assistant driver seat and the back seat of loud speaker 104 by being embedded into vehicle respectively door and be attached to there and be set up.Therefore, in the situation of Fig. 1, for example, carry out the driver under the situation of hand-free conversation, carried out such layout, wherein, adopted the microphone 102 on the sunshading board 103, and be attached to the loud speaker 104 on the door in driver seat left side.
Yet the situation of Fig. 1 comprises the problem of the loud, shrill and long sound (howling) that is caused by the microphone 102 of collecting the sound that sends from loud speaker 104.And the situation of Fig. 1 comprises such problem, and wherein, the position of microphone 102 and loud speaker 104 separates, and for example between sunshading board 103 and door, therefore, has the difficulty of how to lay distribution.
About Handless unit in the car that has proposed its this point, Handless unit proposes in Japan not substantive examination patent application gazette No.2001-146136 in all cars as shown in Figure 2.Utilize Handless unit in the disclosed car of Japan not substantive examination patent application gazette No.2001-146136, the loud speaker 112 that is used for the recipient is set at a shoulder in two shoulders that clip headrest 114 on the back part 111 of seat of vehicle, and the microphone 113 that is used for the sender is set at another shoulder.
According to the configuration among the Japan not substantive examination patent application gazette No.2001-146136, headrest 114 and user (driver) are as noise isolation (noise insulation), therefore whistle and be reduced, and can be shared about the distribution of loud speaker 112 and microphone 113, for example shown in the distribution part 115 among Fig. 2.
Summary of the invention
Yet the problem that Handless unit exists in the car among the above-mentioned Japan not substantive examination patent application gazette No.2001-146136 is: when from the volume of the acoustic emission audio frequency of loud speaker 112 when big, whistling prevents that effect from being weakened.
And the loud speaker 112 of Handless unit can be used for the music of automobile audio (car audio) in the car among the Japan not substantive examination patent application gazette No.2001-146136.Yet in order to prevent to whistle, loud speaker 112 can only be set at the side that microphone 113 is not set in two shoulders that clip headrest 114 on the back part 111.
Therefore, the loud speaker of Handless unit is used under the situation of music of automobile audio in the car in Japan not substantive examination patent application gazette No.2001-146136, and this has caused the configuration that can not carry out the hand-free conversation when left and right sides stereophony reproduces sound when listening to.
That is, reproduce in order to carry out left and right sides stereophony, loud speaker must be disposed on two shoulders on the back part 111 of seat.Yet this loudspeaker layout causes being provided with a side of microphone 113 will be with loudspeaker arrangement near its microphone 113.Yet for Japan not substantive examination patent application gazette No.2001-146136, near the configuration that loud speaker 112 is disposed in the microphone 113 reckons without loud, shrill and long sound.Therefore, for Japan not substantive examination patent application gazette No.2001-146136, the loud speaker that is used for music must be provided with discretely with the loud speaker that is used for the hand-free conversation.
The apparatus and method that realize such layout relationship have been found to provide: by this layout relationship, even under the situation that the loud speaker that is used for the hand-free conversation and microphone are disposed in the adjacent position, also can prevent to whistle.
According to one embodiment of present invention, a kind of Handless unit comprises: loud speaker, this loud speaker is clamped near the user's ear by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate so that the sound mix that will send from its vibrating diaphragm front and back; Microphone, this microphone be set at mixed from the sound that sends of the front and back of the vibrating diaphragm of loud speaker and the zone that is cancelled, and be configured to collect user's call voice; Output unit is configured to export call voice signal from the user of microphone to send it to the conversation partner; And input unit, be configured to receive call voice signal from the conversation partner to provide it to loud speaker.
In the Handless unit according to above-mentioned configuration, loud speaker is clamped near the user's ear by grip unit, and the loudspeaker unit that has is not attached on the reflecting plate so that the sound mix that will send from its vibrating diaphragm front and back.
Microphone is disposed in the sound that sends from the front and back of the vibrating diaphragm of loud speaker by the zone of mixing mutually and being cancelled.Therefore, microphone is seldom collected the audio frequency that sends from loud speaker, and therefore, can not take place owing to collect the loud, shrill and long sound that the audio emission audio frequency causes from the microphone of loud speaker.
In addition, microphone can be disposed in loud speaker near, therefore, can easily carry out wiring.Notice that can carry out such layout, wherein, another loud speaker except above-mentioned loud speaker is arranged and replaces microphone, and its loud speaker is as microphone.
According to one embodiment of present invention, a kind of apparatus, acoustic reproducing with hand-free call function, comprise: first and second loud speakers, they are clamped near user's the left and right sides ear by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate, so that the sound mix that will send from its vibrating diaphragm front and back; The audio signal generation unit is configured to generate and will be provided for first and second loud speakers to stand the audio signal of acoustic reproduction; Microphone, this microphone be set at mixed from the sound that sends of the front and back of the vibrating diaphragm of at least one loud speaker of first and second loud speakers and the zone that is cancelled, and be configured to collect user's call voice; Output unit is configured to export call voice signal from the user of microphone to send it to the conversation partner; First commutation circuit is set between output unit and the microphone, and is configured to form the circuit of the call voice signal of the user from the microphone to the output unit when conversing; Input unit is configured to receive call voice signal from the conversation partner to provide it at least one loud speaker; Second commutation circuit is set between input unit and at least one loud speaker, and is configured to form the circuit of the call voice signal of the conversation partner from input unit at least one loud speaker when conversing; First and second attenuation units are configured to decay from the binaural audio signal of audio signal generation unit when conversation; And addition unit, be set between second commutation circuit and at least one loud speaker, and be configured to audio signal and call voice signal plus from a passage of first and second attenuation units.
In apparatus, acoustic reproducing with hand-free call function according to above-mentioned configuration, first and second loud speakers that are used for left and right sides dual track are clamped near two ears of user by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate, so that the sound mix that will send from its vibrating diaphragm front and back.
Microphone be disposed in mixed from the sound that sends of the front and back of the vibrating diaphragm of at least one loud speaker of first and second loud speakers and the zone that is cancelled.Therefore, microphone is seldom collected the audio frequency that sends from a loud speaker, and therefore, collects the loud, shrill and long sound that the audio emission audio frequency causes even be disposed in the microphone that also can not take place in the position of closing on an one loud speaker by from an one loud speaker at microphone.
Therefore, for example, can carry out such layout, wherein, the microphone of left and right acoustic channels is disposed in respectively on two shoulders on the headrest part of seat, and microphone be disposed in an one loud speaker near.Therefore, for example, even carried out being used for the layout that the loud speaker of hand-free conversation is used to the music of car stereo, this layout also can be considered to the layout that is not easy to whistle.
In addition, microphone can be disposed in loud speaker near, can easily carry out wiring thus.Much less, can carry out such layout: another loud speaker except above-mentioned loud speaker is arranged and replaces microphone, and its loud speaker is as microphone.
In Handless unit according to an embodiment of the invention, even near the situation the microphone loud speaker of microphone (or as) is disposed in loud speaker, its microphone is also seldom collected the audio frequency that sends from its loud speaker, therefore, the loud, shrill and long sound that caused by the audio emission audio frequency from loud speaker can not take place.In addition, microphone can be disposed near the loud speaker, can easily carry out wiring thus.
And even can carry out also can preventing when microphone is disposed near loud speaker the layout of whistling, therefore, microphone and another loud speaker remotely arranged, can prevent the loud, shrill and long sound that causes owing to the audio frequency of collecting from its another loud speaker thus.Therefore, the loud speaker that is used for hand-free also can easily be used as the loud speaker that is used for music.
Description of drawings
Fig. 1 is the diagrammatic sketch that is used to describe according to an example of Handless unit in the car of correlation technique;
Fig. 2 is the diagrammatic sketch that is used to describe according to another example of Handless unit in the car of correlation technique;
Fig. 3 is the block diagram according to the ios dhcp sample configuration IOS DHCP of an embodiment (first embodiment) of Handless unit of the present invention;
Fig. 4 is used for describing the diagrammatic sketch that embodiment according to Handless unit of the present invention is used for the position of the loud speaker of hand-free conversation and microphone;
Fig. 5 is the diagrammatic sketch that is used for describing according to the acoustic pressure null range of the embodiment of Handless unit of the present invention;
Fig. 6 is the diagrammatic sketch of example that illustrates the position of the loud speaker that is used for hand-free conversation in the embodiment according to Handless unit of the present invention and microphone;
Fig. 7 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the embodiment (second embodiment) of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Fig. 8 is the diagrammatic sketch that illustrates according to an example of the position of the loud speaker of second embodiment of the invention and microphone;
Fig. 9 is the diagrammatic sketch that illustrates the example of the action button group of the second and the 7th embodiment according to the present invention;
Figure 10 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the embodiment (the 3rd embodiment) of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 11 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the embodiment (the 4th embodiment) of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 12 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the embodiment (the 5th embodiment) of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 13 is the diagrammatic sketch that is used to describe according to the conversation between the equipment of fifth embodiment of the invention (interior lines conversation) (extension call);
Figure 14 is the diagrammatic sketch that illustrates the example of the action button group of the 5th and the 9th embodiment according to the present invention;
Figure 15 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the embodiment (the 6th embodiment) of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 16 is the diagrammatic sketch that is used to describe according to the conversation between the equipment of sixth embodiment of the invention (interior lines conversation);
Figure 17 is the diagrammatic sketch that illustrates the example of the action button group of the 6th and the tenth embodiment according to the present invention;
Figure 18 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of another embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 19 is the diagrammatic sketch that is used for describing according to the principle assembly of the apparatus, acoustic reproducing with hand-free call function of the embodiment of Figure 18;
Figure 20 is the block diagram according to the ios dhcp sample configuration IOS DHCP of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 21 A and 21B are the diagrammatic sketch that is used to describe according to the example of the loud speaker attach configuration of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 22 is used to describe the diagrammatic sketch that is used for according to the position of the loud speaker of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 23 is used to describe the diagrammatic sketch that is used for according to the mobile status of the loud speaker travel mechanism of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 24 is used to describe the diagrammatic sketch that is used for according to the mobile status of the loud speaker travel mechanism of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 25 is used to describe the diagrammatic sketch that is used for according to an example of the loud speaker travel mechanism of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 26 is used to describe the diagrammatic sketch that is used for according to an example of the loud speaker travel mechanism of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 27 is the flow chart according to the operation of the principle assembly of the 7th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 28 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the 8th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 29 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the 9th embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 30 is the block diagram of ios dhcp sample configuration IOS DHCP that illustrates the part of the ninth embodiment of the present invention;
Figure 31 is the block diagram of ios dhcp sample configuration IOS DHCP that illustrates another part of the ninth embodiment of the present invention;
Figure 32 is the diagrammatic sketch that is used to describe according to the conversation between the equipment of ninth embodiment of the invention (interior lines conversation);
Figure 33 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of the tenth embodiment of the apparatus, acoustic reproducing with hand-free call function of the present invention;
Figure 34 is the diagrammatic sketch that is used to describe according to the conversation between the equipment of tenth embodiment of the invention (interior lines conversation);
Figure 35 A to 35C is the diagrammatic sketch that is used to describe according to another position example of loud speaker that is used for the hand-free conversation of the present invention and microphone;
Figure 36 is the diagrammatic sketch that illustrates the position example of the loud speaker that is used for hand-free conversation in another embodiment according to Handless unit of the present invention and microphone.
Embodiment
Describe according to the embodiment of Handless unit of the present invention below with reference to the accompanying drawings and have embodiment according to the apparatus, acoustic reproducing of hand-free call function of the present invention.
Note, for convenience of description, for first to the 6th following embodiment, the microphone that utilization is configured to collect user's call voice is described, and reach thereafter for the 7th embodiment, will be for the following line description that is configured into: wherein, loud speaker replaces its microphone and is arranged, and its loud speaker is as microphone.
The embodiment of Handless unit (first embodiment)
Fig. 3 is the diagrammatic sketch that is used to describe according to the ios dhcp sample configuration IOS DHCP of an embodiment of Handless unit of the present invention.For the Handless unit 10 according to embodiment shown in Figure 3, loud speaker 1 is disposed near left ear of the user 3.Loud speaker 1 is configured to exposed loud speaker.Particularly, for loud speaker 1, its loudspeaker unit is not stored in loudspeaker enclosure, and is not attached to reflecting plate yet, so that the sound that sends previously of the vibrating diaphragm of loudspeaker unit can mix with the sound that sends from behind.
For exposed loud speaker 1, as shown in Figure 4, from the sound wave Sf that sends previously of the vibrating diaphragm of loudspeaker unit with mixed from its sound wave Sb that sends later.Here, from the phase place (referring to (A) Fig. 5) of the sound wave Sf that sends previously of the vibrating diaphragm of loudspeaker unit with become inverting each other from the phase place (referring to (C) Fig. 5) of the sound wave Sb that sends later of vibrating diaphragm.Therefore, for than with the parallel plane plane of the excircle end of the vibrating diaphragm that comprises loud speaker 1 in the zone of excircle end more lateral of its vibrating diaphragm, the sound that existence is sent from the front and back of its vibrating diaphragm is mixed and be cancelled the regional Zo of (referring to (B) Fig. 5), and acoustic pressure is about zero (after this, being called " acoustic pressure null range ").
Can confirm acoustic pressure null range Zo from the sound wave that loud speaker 1 sends by when reproducing audio frequency, utilizing the microphone collection at loud speaker 1 place.Fig. 4 illustrates this zone with dotted line 5.
For present embodiment, the microphone 2 that is used for collecting the audio frequency that sender (user 3) sent is disposed in the optional position of acoustic pressure null range Zo.Notice that in this manual, term " sender " refers to the transmit leg conversed, and term " recipient " refers to the recipient that converses.
In actual use, for example, the neighborhood of the excircle frame part of the vibrating diaphragm of loud speaker 1 becomes acoustic pressure null range Zo, and therefore, microphone 2 is fixed to the excircle frame part of the vibrating diaphragm of its loud speaker 1, and microphone 2 is disposed among the acoustic pressure null range Zo.That is, for this example, the grip unit of microphone 2 is as loud speaker 1.
For present embodiment, as shown in Figure 6, loud speaker 1 is fixed to left ear side of the user 3 of the headrest part 7 of the seat 6 that user 3 sat, so that the vibration plane user oriented side of vibrating diaphragm 1C.For this example, for the vibration plane user oriented side of the vibrating diaphragm 1C that makes loud speaker 1, loud speaker 1 for example is attached to headrest part 7 with respect to the tilt states of 45 degree of the lengthy motion picture direction of headrest part 7 with the vibration plane of vibrating diaphragm 1C.
As shown in Figure 6, microphone 2 is fixed among the excircle frame part 1A of vibrating diaphragm 1C of loud speaker 1 and the corresponding position of user 3 mouth.For the example among Fig. 6, loud speaker 1 is attached to headrest part 7 with the state that the attachment position of the microphone 2 among the excircle frame part 1A of loud speaker 1 is positioned at the least significant end position.
Collected by microphone 2 from the call voice that user 3 sends.The call voice signal that obtains through the acoustic-electric conversion in microphone 2 is provided for low pass filter 12 via amplifier of microphone 11.Then, in the present embodiment, the output audio signal of low pass filter 12 is provided for sender's audio input end of cellular phone terminal 4 via audio signal output end 13.
And, be imported into Handless unit 10 according to present embodiment from recipient's audio output of cellular phone terminal 4 via audio signal input end 14 from recipient's audio signal of conversation partner.Then, the recipient's audio signal via 14 inputs of audio signal input end is provided for loud speaker 1 via power amplifier 15.In this case, loud speaker 1 is disposed near the user's ear, therefore, can force down the volume of the call voice that sends from loud speaker 1.This prevents it also is more effective to what whistle.
In the present embodiment, low pass filter 12 is according to following former thereby be set up.Particularly, the sound that sends from the front and back of the vibrating diaphragm 1C of exposed loud speaker 1, and especially for low frequency, be significant to the neutralization effect of the sound that sends from the front and back of vibrating diaphragm 1C.Greatly decayed in acoustic pressure null range Zo to high fdrequency component the sound that sends from the front and back of the vibrating diaphragm 1C of exposed loud speaker 1, but vanishing fully.
Therefore, in the present embodiment, in order stably to carry out conversation to guarantee the mode that does not have to whistle according to low pass filter 12, the component of the sound that sends from the front and back of the vibrating diaphragm 1C of exposed loud speaker 1 is restricted to only call voice band component, when microphone 2 was disposed among the above-mentioned acoustic pressure null range Zo, the boosting of this call voice band component was close to and is cancelled fully and vanishing.In this example, the cut-off frequency of low pass filter 12 for example is set as about 2kHz.The cut-off frequency of low pass filter 12 depends on the environment for use of Handless unit and difference, and for example, and can to conceive cut-off frequency be 1kHz or be lower than 1kHz.
According to above-mentioned configuration, utilize Handless unit 10 according to present embodiment, can under the situation of not worrying whistling, stably carry out conversation.Microphone 2 can be fixed to loud speaker 1, and in this case, loud speaker 1 and microphone 2 are approaching, and can be taken as a unit, and the benefit of accessory attachment, distribution etc. easily is provided thus.
And for example, shown in dotted line in Fig. 6, right channel loudspeaker SPR is disposed in right ear side, and is left channel loudspeaker according to the loud speaker 1 of the foregoing description, can easily realize the apparatus, acoustic reproducing of stereophony thus.
Notice that in the above-described embodiments, loud speaker 1 and microphone 2 only are disposed in user's left side, yet much less, loud speaker 1 and microphone 2 also can be disposed in user's right side.
And loud speaker and microphone are disposed in user's the left and right sides according to the layout relationship identical with above-mentioned loud speaker 1 and microphone 2, and may be used to the hand-free conversation.In this case, sound is collected in the microphone of the left and right sides, and sender's audio signal of process low pass filter is synthesized, and is sent out from audio signal output end 13.And, be distributed to left and right sides loud speaker from recipient's audio signal of conversation partner, and the signal through distributing stands acoustic reproduction.
Embodiment with apparatus, acoustic reproducing of hand-free call function
Second embodiment
Fig. 7 is the block diagram that illustrates an embodiment (second embodiment) of the apparatus, acoustic reproducing with hand-free call function.In Fig. 7, the assembly identical with assembly in the above-mentioned Handless unit 10 is denoted by the same reference numerals.This second embodiment is such situation: in the stereo apparatus, acoustic reproducing of left and right sides dual track, the loud speaker of an one sound channel is used as the loud speaker that is used for the hand-free call function.
Have with lower unit according to the apparatus, acoustic reproducing with hand-free call function of present embodiment and to constitute: audio signal processing unit 20, as music source unit 30, control unit 40, action button group 41 and the cellular phone terminal 4 of the example of audio signal generation unit.
As shown in Figure 8, in the present embodiment, the loud speaker 1L of L channel and the loud speaker 1R of R channel are attached to the both sides of the headrest part 52 of the seat 51 that user 3 sat.These loud speakers 1L and the 1R of left and right acoustic channels have exposed speaker configurations.
In the present embodiment, for the sound wave that the loud speaker 1L from L channel sends, the microphone 2 that is used for collecting sender's audio frequency of sender (user 3) is disposed in the optional position of acoustic pressure null range Zo.As mentioned above, the neighborhood of the excircle frame part of the vibrating diaphragm of loud speaker 1L becomes acoustic pressure null range Zo, and therefore, in the present embodiment, microphone 2 also is fixed to the excircle frame part of the vibrating diaphragm of its loud speaker 1L, and is disposed among the acoustic pressure null range Zo.
In the present embodiment, the loud speaker 1L of L channel is used for the hand-free call function, and therefore, microphone 2 only is set to the loud speaker 1L of L channel, and the loud speaker of R channel is not used in the hand-free conversation.
In the present embodiment, music source unit 30 comprises CD (compact disk) player 31C, hard disk drive (after this, being abbreviated as HDD) 31H and broadcast reception unit 31B.When CD was mounted to CD Player 31C, CD Player 31C decoded to binaural audio signal and with its output.The music data of a large amount of music contents is stored among the HDD 31H, and when it was selected, HDD 31H decoded with the output binaural audio signal to music data.Broadcast reception unit 31B for example can receive AM radio broadcasting, FM radio broadcasting, television broadcasting etc., and received broadcast audio is output as binaural audio signal.
In the present embodiment, the audio signal from the left and right acoustic channels of CD Player 31C, HDD 31H and broadcast reception unit 31B is provided for audio signal processing unit 20.
In audio signal processing unit 20, be transfused to the source from the audio signal of the dual track of CD Player 31C, HDD 31H and broadcast reception unit 31B and select circuit 32.
As shown in Figure 9, action button group 41 comprises the selector button such as telephone button 61, CD button 62, HDD button 63, broadcasting button 64 etc., and volume control knob 65.Be provided for control unit 40 with the corresponding operation signal of the push-botton operation of user on action button group 41.
Notice that action button group 41 also comprises repeat playing and shuffle for CD Player 31C and HDD 31H except comprising aforesaid selector button, and be used for action button that the broadcasting channel of broadcast reception unit 31B selects etc.Yet,, omit illustrating and describing to these buttons in order to simplify description.
For example the control unit 40 that is made of microcomputer mounted thereto generates with the user and utilizes the corresponding control signal of push-botton operation of action button group 41, and provides it to the necessary unit in music source unit 30 and the audio signal processing unit 20.
The apparatus, acoustic reproducing with hand-free call function according to present embodiment is controlled by control unit 40, so that be in the music source play mode when telephone button 61 is not pressed, and so that is in the hand-free call mode when telephone button 61 is pressed.Notice that in the hand-free call mode according to present embodiment, control is performed so that the volume of music source is reduced to the degree that the broadcast of music source is not stopped, that is, be reduced to the hand-free impregnable degree of conversing, as described later.
In the music source play mode, when the selector button such as CD button 62, HDD button 63, broadcasting button 64 etc. about music source was pressed, control unit 40 was selected signal to offer the source in the source and is selected circuit 32.
The source selects circuit 32 to select the control of signal-selectivity ground by its source, and carries out and select control so that select and the corresponding music source of pressing of selector button.For example, when CD button 62 is pressed, the audio signal of two sound channels about the source selects circuit 32 optionally to export from CD Player 31C.Similarly, the source selects circuit 32 when HDD button 63 is pressed, the audio signal of two sound channels from about the HDD 31H output optionally, and when broadcasting button 64 is pressed from about the broadcast reception unit 31B output audio signal of two sound channels.
For present embodiment, in the audio signal of two sound channels selecting circuit 32 from the source, the audio signal of L channel is provided for hybrid circuit 36 via attenuation units 33L with recipient's audio signal when conversation is arranged.The loud speaker 1L that the output audio signal of hybrid circuit 36 is provided for L channel via voltage divider (potentiometer) 34L that is used for volume control and power amplifier 35L, and by acoustic reproduction.
And, the loud speaker 1R that selects the audio signal of the R channel in the audio signal of two sound channels of circuit 32 to be provided for R channel from the source via attenuation units 33R, the voltage divider 34R that is used for volume control and power amplifier 35R, and by acoustic reproduction.
In this case, loud speaker 1L and 1R are disposed near the user's ear, and therefore, the sound that sends from loud speaker 1L and 1R can be depressed less output volume.
In the apparatus, acoustic reproducing with hand-free call function according to present embodiment, attenuation units 33L and 33R are what to be used for reducing when carrying out the hand-free conversation from the volume of the music source of music source unit 30.In the music source play mode, the attenuation of attenuation units 33L and 33R is zero.That is, in the music source play mode, the input audio signal that attenuation units 33L and 33R I/O are not attenuated.
When the telephone button 61 in user's push button groups 41, control unit 40 detects this so that the music source play mode is switched to the hand-free call mode, and attenuation control signal is offered attenuation units 33L and 33R so that the audio signal of circuit 32 is selected in decay from the source.
In this case, the attenuation of attenuation units 33L and 33R is selected as making that the audio signal of music source is attenuated to the degree that does not hinder conversation.The attenuation of attenuation units 33L and 33R can be identical.Yet in the present embodiment, only L channel is used for conversation, and therefore, the attenuation that is used for the attenuation units 33L of L channel is set to the attenuation greater than the attenuation units 33R that is used for R channel.For example, in the present embodiment, when hand-free was conversed, the attenuation that is used for the attenuation units 33L of L channel was set as-20dB, and the attenuation that is used for the attenuation units 33R of R channel is set as-10dB.
The voltage divider 34L and the 34R that are used for volume control are used for operating the volume that controls the audio signal that is provided to loud speaker 1L and 1R according to it when operating volume control knob 65 by the user.
Particularly, for example when the user with volume control knob 65 when the right rotates, control unit 40 detects voltage divider 34L and the 34R that is used for volume control with control to this, thereby makes the volume of the audio signal that will be provided for loud speaker 1L and 1R increase amount with its rotation amount equivalence.And, for example when the user with volume control knob 65 when the left side rotates, control unit 40 detects voltage divider 34L and the 34R that is used for volume control with control to this, thereby makes the volume that will be provided for the audio signal of loud speaker 1L and 1R reduce amount with its rotation amount equivalence.
Next, use description to the treatment system of the audio signal of hand-free conversation.In the present embodiment, as shown in Figure 7, according to microphone 2, the call voice that sends from user 3 is collected, and generates the call voice signal through the acoustic-electric conversion, and the call voice signal is transfused to audio signal processing unit 20.In audio signal processing unit 20, be provided for the low pass filter 22 that is similar to above-mentioned low pass filter 12 via amplifier of microphone 21 from the call voice signal of microphone 2.Then, the output audio signal of low pass filter 22 is provided for conversation side terminal (input) T of commutation circuit 23, and commutation circuit 23 is switched between conversation and music source broadcast.
Music side terminal (input) the M ground connection of commutation circuit 23.In the present embodiment, the switched terminal of commutation circuit 23 (output) is connected to sender's audio input end of cellular phone terminal 4 via audio signal output end 24.That is, sender's audio signal of the user 3 who collects in microphone 2 is provided to sender's audio input end of cellular phone terminal 4.
And, be transfused to audio signal processing unit 20 according to present embodiment via audio signal input end 25 from recipient's audio output of cellular phone terminal 4 from recipient's audio signal of conversation partner.Then, be provided for conversation side terminal (input) T of commutation circuit 26, commutation circuit 26 switching between conversation and music source are play via recipient's audio signal of audio signal input end 25 inputs.
In the present embodiment, music side terminal (input) the M ground connection of commutation circuit 26.The switched terminal of commutation circuit 26 (output) is connected to hybrid circuit 36, and when having conversation, is provided for hybrid circuit 36 from recipient's audio signal of conversation partner via conversation side terminal T.Then, the output audio signal of hybrid circuit 36 is provided for left channel loudspeaker 1L via the voltage divider 34L and the power amplifier 35L that are used for volume control, and by acoustic reproduction.
The operation of second embodiment
In the music source play mode, commutation circuit 23 and 26 all is switched to music side terminal M, and the audio signal of collecting from microphone 2 is provided to earth terminal via commutation circuit 23.And, be switched circuit 26 from the audio signal of cellular phone terminal 4 and interrupt.
Be provided for the loud speaker 1L and the 1R of left and right acoustic channels from the music source of music source unit 30, and by acoustic reproduction.The attenuation of attenuation units 33L and 33R is set as zero at this moment.Output volume changes by the operation to the volume control knob in the action button group 41 65.And, the source of waiting the audio signal that changes two sound channels will sending from music source unit 30 by the CD button 62 in the operating operation button groups 41, HDD button 63, broadcasting button 64.
Next, when the music source play mode, receive in the situation that enters conversation at cellular phone terminal 4, for present embodiment, the user carries out in cellular phone terminal 4 and enters close-talking response operation (for example, the off-hook operation), and the telephone button in the push button groups 41 61.
And, send the situation of going out to call out to the conversation partner from cellular phone terminal 4 user 3 with the conversation of execution hand-free, for present embodiment, user 3 carries out conversation partner's the call operation of going out in cellular phone terminal 4, and presses telephone button 61.
When the telephone button 61 in user's push button groups 41, control unit 40 detects so that audio signal processing unit 20 is switched to the hand-free call mode this.Then, control unit 40 is provided for they are switched to the switch-over control signal of conversation side terminal T to commutation circuit 23 and 26, and above-mentioned attenuation control signal is exported to attenuation units 33L and 33R.Therefore, attenuation units 33L is its input audio signal decay-20dB, and with its output.And attenuation units 33L is its input audio signal decay-10dB, and with its output.
Sender's audio signal of the user's 3 who collects at microphone 2 places the audio frequency of speaking is provided for cellular phone terminal 4 via amplifier of microphone 21, low pass filter 22, commutation circuit 23 and audio signal output end 24, and is sent to the conversation partner via cellular phone network.And the recipient's audio signal from the conversation partner that receives at cellular phone terminal 4 is imported into audio signal processing unit 20 via audio signal input end 25.
From recipient's audio signal of conversation partner input hybrid circuit 36 by with mixes from the audio signal of attenuation units 33L, and be provided to loud speaker 1L via being used for voltage divider 34L and power amplifier 35L that volume controls.Therefore, recipient's audio signal is mixed with the audio signal through decay of L channel, and is reproduced from acoustics by loud speaker 1L.And the audio signal of R channel is attenuated to-10dB, and is reproduced from acoustics by right channel loudspeaker 1R.
Therefore, in the hand-free call mode, from the binaural audio signal of music source unit 30 in attenuation units 33L and 33R, be attenuated respectively-20dB and-10dB, prevent from thus that call voice from becoming can not hear.
Therefore, in the hand-free call mode, continuing to listen to the music source that the user listens in the music source play mode when, can carry out hand-free conversation with the conversation partner by cellular phone terminal 4.
Loud speaker 1L and 1R are disposed near the user's ear, and therefore, original sound emission output volume (boosting) can be depressed.Be disposed in the combination of the advantage among the acoustic pressure null range Zo of loud speaker 1L according to this advantage and microphone 2,, can when preventing to whistle and listening to music source, carry out the hand-free conversation for present embodiment.
Pressing telephone button 61 user 3 attempts carrying out the situation of hand-free conversation to send to go out to call out to the conversation partner from cellular phone terminal 4, when the conversation partner responds this, can when listening to music source like that as mentioned above, carry out the hand-free conversation.
Note, in the present embodiment, by allowing the user to utilize cellular phone terminal 4 to carry out to enter the call operation and the call operation of going out is handled respectively the response that enters calling in the cellular phone terminal 4 and the call operation of going out.
Yet, under cellular phone terminal 4 comprises situation with the splicing ear of computer, have such hand-free kit (kit), this hand-free kit adopts its splicing ear to realize registered partner's the automatic call entry/terminated call and the call function of going out under the situation that button is touched by single.Therefore, this hand-free kit function is included in the control unit 40, and thus, control unit 40 obviously can be carried out the function such as automatic call entry/terminated call etc.
The 3rd embodiment (embodiment) with apparatus, acoustic reproducing of hand-free call function
In above-mentioned second embodiment, carried out such description: the user adopts the action button in the action button group 41 to carry out the control such as each source of CD Player 31C, HDD31H, broadcast reception unit 31B etc. in the music source unit 30.
On the other hand, this 3rd embodiment is such situation: when by audio identification selection control and volume control being carried out in each source, the microphone that is used for the hand-free call function is used to collect audio frequency control speech.Notice that in the present embodiment, the control of the action button by action button group 41 also can be performed, and in addition, the control by audio identification can be performed.
Figure 10 is the block diagram of ios dhcp sample configuration IOS DHCP that illustrates the 3rd embodiment of the apparatus, acoustic reproducing with hand-free call function.In Figure 10, the assembly identical with the ios dhcp sample configuration IOS DHCP of second embodiment among Fig. 7 is denoted by the same reference numerals, and omits the description to it.
In the 3rd embodiment, as shown in Figure 8, the loud speaker 1L of L channel and the loud speaker 1R of R channel are attached to the both sides of the headrest part 52 of the seat 51 that user 3 sat.These loud speakers 1L and the 1R of left and right acoustic channels have exposed speaker configurations.For the sound wave that the loud speaker 1L from L channel sends, the microphone 2 that is used for collecting sender's audio frequency of sender (user 3) is disposed in the optional position of acoustic pressure null range Zo.
In the present embodiment, microphone 2 also is fixed to the excircle frame part of the vibrating diaphragm of its loud speaker 1L, and microphone 2 is disposed among the acoustic pressure null range Zo.
In this 3rd embodiment, as shown in figure 10, be provided to the switched terminal (input) of commutation circuit 23M from the audio signal of microphone 2 via low pass filter 22.Then, in the present embodiment, be provided to sender's audio signal input end of cellular phone terminal 4 via audio signal output end 24 from conversation side terminal (output) T of commutation circuit 23M from the audio signal of microphone 2 via low pass filter 22.
And, in the present embodiment, be provided for speech recognition circuit 42 from the audio signal of microphone 2 via music side terminal (output) M of commutation circuit 23M via low pass filter 22.Speech recognition circuit 42 is configured to be used for the speech (for example, " repetition ", " change ", " raising volume ", " reduction volume " etc.) of speaking of speaking speech (for example " CD ", " HDD " " broadcasting " etc.) and being used to control that the source is selected so that discern.Then, the audio identification result in the speech recognition circuit 42 is provided for control unit 40.
Control unit 40 is carried out corresponding to the control from the audio identification result of speech recognition circuit 42.For example, when determining to receive the audio identification as a result time that is used for the speech (for example " CD ", " HDD " " broadcasting " etc.) of speaking selected in the source from speech recognition circuit 42, control unit 40 handover source selection circuit 32 is so that select its selected source of speech of speaking.For example, when having determined " CD ", control unit 40 handover source are selected circuit 32 so that to select CD Player 31C.
And when being selected as the source, when having determined " repetition ", control unit 40 is carried out control so that play the music content of just playing once more at " CD " and " HDD ".And when being selected as the source, when having determined " change ", control unit 40 control CD Player 31C or HDD 31H are so that the music content that will play is now changed into another music content at " CD " and " HDD ".And when being chosen as the source, when having determined " change ", control unit 40 control broadcast reception unit 31B are so that the broadcasting channel that will receive is changed into another channel from current channel in " broadcast reception unit ".
And when having determined " raising volume " or " reduction volume ", control unit 40 is controlled voltage divider 34L and the 34R that is used for volume control according to the speech of being discerned of speaking.
Identical among other configuration and operation and above-mentioned second embodiment.That is, except the audio signal from microphone 2 in the acquisition of music side terminal (output) the M place of commutation circuit 23M was provided to speech recognition circuit 42, present embodiment had the configuration identical with second embodiment.
According to above-mentioned the 3rd embodiment, except the advantage of above-mentioned second embodiment, the advantage below also providing.
Particularly, being used for microphone that sender's audio frequency of hand-free conversation collects also can be with acting on the microphone of collecting the speech of speaking that is used for audio identification (be used to select music source and be used for control such as volume control etc.).According to audio identification, can be performed the control of the selection of music source, volume control etc., therefore, if this 3rd embodiment for example is applied to audio device in car, then not only can realize hand-free, improve fail safe thus for the hand-free conversation but also for music.
Notice that much less, this 3rd embodiment not only can be applied to audio device in car, and for example can be applied to the microphone of aforesaid headrest part by the seat that is attached to the people and the device that loud speaker constitutes.
The 4th embodiment (audio system in the car)
This 4th embodiment is arranged so that have when the broadcast in the positive music appreciating of each user source and carries out conversation between two apparatus, acoustic reproducings of hand-free call function.Following formula embodiment is such situation: for example, the apparatus, acoustic reproducing with hand-free call function is set to driver seat and copilot (passenger) seat as audio system in the car.
Figure 11 is the block diagram that illustrates according to the configured in one piece of audio system in the car of the 4th embodiment.Notice that assembly same with the above-mentioned embodiment is denoted by the same reference numerals.As shown in figure 11, in this 4th embodiment, for example, user 3B is sitting in the assistant driver seat, and user 3A is sitting in the driver seat.
In the 4th embodiment, the loud speaker 1LA of L channel and 1LB are attached to the left-hand end of the headrest part (not shown) of the seat that user 3A and 3B sat, and the loud speaker 1RA of R channel and 1RB are attached to the right-hand end of headrest part.Loud speaker 1LA, 1LB, 1RA and the 1RB of left and right acoustic channels have exposed speaker configurations.
In this 4th embodiment, for the user 3A of driver seat, the microphone 2A that is used for collecting sender's audio frequency of sender (user 3A) is disposed in the optional position of the relevant acoustic pressure null range Zo of the sound wave that sends with loud speaker 1LA from L channel.And for the user 3B of assistant driver seat, the microphone 2B that is used for collecting sender's audio frequency of sender (user 3B) is disposed in the optional position of the relevant acoustic pressure null range Zo of the sound wave that sends with loud speaker 1RB from R channel.
In the present embodiment, microphone 2A and 2B also are fixed to the excircle frame part as the vibrating diaphragm of its loud speaker 1LA of acoustic pressure null range Zo and 1RB, and microphone 2A and 2B are disposed among the acoustic pressure null range Zo.
As mentioned above, in the present embodiment, microphone 2A is set at the loud speaker 1LA side with respect to the L channel of the user 3A of driver seat, and microphone 2B is set at the loud speaker 1RB side with respect to the R channel of the user 3B of assistant driver seat.
Therefore, microphone 2A and 2B are arranged in the left side and the right so that the separated reason of opening is: prevent that as far as possible microphone 2A from collecting the audio frequency of speaking of user 3B, and prevent that as far as possible microphone 2B from collecting the audio frequency of speaking of user 3A.
In the present embodiment, action button group 41A is provided with for user 3A, and action button group 41B is provided with for user 3B.With user 3A and 3B the corresponding operation signal of the operation of action button group 41A and 41B is provided for control unit 40.Among control unit 40 decision operation button groups 41A and the 41B which is operated, and in the decision operation button which be pressed, and carries out control according to judged result.
Audio signal processing unit 20A is provided with respect to user 3A, and audio signal processing unit 20B is provided with respect to user 3B.Cellular phone terminal 4A can be connected to audio signal processing unit 20A, and cellular phone terminal 4B also can be connected to audio signal processing unit 20B.In addition, from CD Player 31C, the HDD 31H of music source unit 30 and broadcast reception unit 31B each about the audio signal of two sound channels be provided for each of audio signal processing unit 20A and 20B.
Audio signal processing unit 20A and 20B have and the configuration identical according to the audio signal processing unit 20 of above-mentioned second embodiment basically.Particularly, such configuration is used: wherein, can be selected and reproduce from the music source of music source unit 30, and can be performed by cellular phone terminal 4A and 4B and cellular phone network with external call partner's telephone relation (hand-free conversation).
In this 4th embodiment, audio signal processing unit 20A and 20B are configured to the conversation that makes between the device and can utilize loud speaker 1LA, microphone 2A, loud speaker 1RB and microphone 2B to be performed between user 3A and 3B.If we say that the conversation that utilizes cellular phone terminal is the outside line conversation, then this conversation between the device is exactly so-called interior lines conversations (talk between the user).
In addition, in this 4th embodiment, the seat that user 3A and 3B are sat comprises attend a banquet transducer 43A and 43B, is used for respectively user 3A and 3B taken one's seat detecting.The attending a banquet of transducer 43A and 43B of attending a banquet detected output and is provided for control unit 40.
Control unit 40 only will be output as the be seated user 3A of state and/or the corresponding audio signal processing unit 20A of 3B and/or 20B of expression and be made as operable state with detecting from attending a banquet of attend a banquet transducer 43A and 43B.For example, control unit 40 only offers supply voltage with detecting from attending a banquet of attend a banquet transducer 43A and 43B and is output as expression be seated user 3A and/or the corresponding audio signal processing unit 20A of 3B and/or the 20B of state, enable its operation, realize the electric energy saving thus.
Audio signal processing unit 20A has identical configuration with 20B.Figure 12 illustrates the representative of the configuration of audio signal processing unit 20A as two processing unit 20A and 20B.In Figure 12, the assembly identical with Fig. 7 represented with the identical label that has added suffix A.
And Figure 13 is the diagrammatic sketch that only extracts and illustrate the assembly that is used for the hand-free conversation among audio signal processing unit 20A and the 20B.In Figure 13, the same components between audio signal processing unit 20A and the 20B is represented with the identical label that has added suffix A and B.
As shown in figure 12, collect the call voice that user 3A sends and make it through acoustic-electric conversion and generate the call voice signal by microphone 2A, and this call voice signal is imported into audio signal processing unit 20A.
Utilize audio signal processing unit 20A, be provided for low pass filter 22A via amplifier of microphone 21A from the call voice signal of microphone 2A.Then, the output audio signal of low pass filter 22A is provided for conversation side terminal (input) T of commutation circuit 23A, and commutation circuit 22A switches between conversation and music source broadcast.
In the present embodiment, music side terminal (input) the M ground connection of commutation circuit 23A.The switched terminal of commutation circuit 23A (output) is connected to the switched terminal (input) of commutation circuit 27A, commutation circuit 27A the conversation of the outside line by cellular phone terminal 4A and and the talk (interior lines conversation) of another user 3B between switch.
In the present embodiment, the outside line of commutation circuit 27A conversation side terminal (output) ET is connected to sender's audio input end of cellular phone terminal 4A by the sub-24A of audio signal output end.
And, be imported into audio signal processing unit 20A according to present embodiment from recipient's audio output of cellular phone terminal 4A via the sub-25A of audio signal input end from recipient's audio signal of conversation partner.Then, be provided to outside line conversation side terminal (input) ET of commutation circuit 28A via recipient's audio signal of the sub-25A of audio signal input end input, commutation circuit 28A converse by the outside line of cellular phone terminal 4A and and the talk (interior lines conversation) of another user 3B between switch.
In this 4th embodiment, as shown in figure 13, the interior lines of commutation circuit 27A conversations side terminal (output) IT is connected to interior lines conversation side terminal (input) IT of commutation circuit 28B of the audio signal processing unit 20B of another user 3B.And the interior lines of the commutation circuit 27B of the audio signal processing unit 20B of another user 3B conversation side terminal (output) IT is connected to interior lines conversation side terminal (input) IT of commutation circuit 28A of the audio signal processing unit 20A of user 3A.
The audio signal that obtains in the switched terminal (output) of commutation circuit 28A is provided for conversation side terminal (input) T of commutation circuit 26A.In the present embodiment, music side terminal (input) the M ground connection of commutation circuit 26A.
The audio signal that obtains in the switched terminal (output) of commutation circuit 26A is provided for hybrid circuit 36A, and is added to the left channel audio signal that is provided for hybrid circuit 36A via attenuation units 33LA.
Notice that in the situation of the audio signal processing unit 20B relevant with user 3B, the audio signal that obtains at the output of commutation circuit 28B is provided for hybrid circuit 36B via the conversation side terminal T of commutation circuit 26B with the audio signal of R channel.Then, the audio signal that obtains at the output of commutation circuit 28B is added to the right channel audio signal via attenuation units 33RB at hybrid circuit 36B place.
In this 4th embodiment, for action button group 41A and 41B, as shown in figure 14, talk button 66 is added in the configuration of action button group 41 shown in Figure 9.When talk button 66 was pressed, control unit 40 had determined to produce the interior lines call request in the hand-free call mode, and carried out the control operation that is used to enable its interior lines conversation.
The operation of the 4th embodiment
To describe below when the associative operation that utilizes by user 3A or 3B when coming action button among operating operation button groups 41A or the 41B according to system of the 4th embodiment of configuration like this.
Control unit 40 monitoring detect output from attending a banquet of attend a banquet transducer 43A and 43B, to detect the state of taking one's seat to the seat of user 3A or 3B.When detecting user 3A and take one's seat, 40 pairs of audio signal processing unit 20A power supplies of control unit are to enable its operation then.Similarly, when detecting user 3B and take one's seat, 40 pairs of audio signal processing unit 20B power supplies of control unit are to enable its operation.Notice that present embodiment is the Che Nei system, therefore, much less, this system is powered when the accessory switch is opened with key.
Detect user 3A wherein and 3B takes one's seat and its operation Be Controlled unit 40 enables audio signal processing unit 20A and 20B in, except the situation that talk button 66 is pressed, carry out and the above-mentioned first embodiment identical operations.
Particularly, in the music source play mode that telephone button 61 is not pressed, for present embodiment, for example, in audio signal processing unit 20A, commutation circuit 23A and 26A are connected to music side terminal M by control unit 40.Then, in the music source play mode, as mentioned above, under the control of control unit 40,, and utilize two loud speakers to make this source through the stereophony audio reproducing according to the selection source of pressing down to CD button 62, HDD button 63, broadcasting button 64 etc.In the present embodiment, user 3A can select and appreciate different music source with 3B.
When telephone button 61 was pressed in the music source play mode, control unit 40 switched to the hand-free call mode.In the present embodiment, for example, in the situation of audio signal processing unit 20A, control unit 40 switches to conversation side terminal T with commutation circuit 23A and 26A, and commutation circuit 27A and 28A are switched to outside line conversation side terminal ET.And control unit 40 control attenuation units 33LA are with its attenuated input signal-20dB, and control attenuation units 33RA is with its attenuated input signal-10dB.
In the hand-free call mode, as mentioned above, be sent to the conversation partner, and in a sound channel, listened to from recipient's audio frequency of conversation partner from sender's audio frequency of microphone 2A.Therefore, can when continuing music, carry out the hand-free conversation.
Next, with the associative operation of describing when talk button 66 is operated.In the present embodiment, are interior lines call request to the operation of the talk button 66 of action button group 41A, and are interior lines call request from user 3B to user 3A to the operation of the talk button 66 of action button group 41B from user 3A to user 3B.
In the situation that the interior lines call request takes place, control unit 40 judge the partner who is asked whether take one's seat with and audio signal processing unit whether be in operable state, and be in the situation of operable state not at its audio signal processing unit, control unit 40 is to its result of user notification who has asked its interior lines call request.This notice for example is used for the method that buzzer is mixed into the audio signal of music source waited by control unit 40 to be carried out.
Next, when the partner's who has been performed the interior lines call request audio signal processing unit was in operable state, control unit 40 was carried out control so that obtain to carry out the state of hand-free interior lines conversations (talk).
This control example is described as the example that will utilize user 3A to supress in the situation of talking button 66.In audio signal processing unit 20A, control unit 40 at first switches to conversation side terminal T with commutation circuit 23A and 26A, and commutation circuit 27A and 28A are switched to interior lines conversation side terminal IT.Then, in audio signal processing unit 20B, control unit 40 switches to conversation side terminal T with commutation circuit 23B and 26B, and commutation circuit 27B and 28B are switched to interior lines conversation side terminal IT.Figure 13 illustrates the switching state of commutation circuit 23A, 26A, 27A, 28A, 23B, 26B, 27B and the 28B of this moment.
And the attenuation of the attenuation units 33LA of control unit 40 control audio signal processing unit 20A and the attenuation units 33RB of audio signal processing unit 20B is so that be made as-20dB.And the attenuation of the attenuation units 33RA of control unit 40 control audio signal processing unit 20A and the attenuation units 33LB of audio signal processing unit 20B is so that be made as-10dB.
According to the switching of above-mentioned commutation circuit, sender's audio signal of the user 3A that collects at microphone 2A place is provided to partner's audio signal processing unit 20B via the route of amplifier of microphone 21A → low pass filter 22A → commutation circuit 23A → commutation circuit 27A.
Then, in audio signal processing unit 20B, be provided for loud speaker 1RB from the audio signal of audio signal processing unit 20A via the route of commutation circuit 28B → commutation circuit 26B → hybrid circuit 36B → be used for voltage divider 34RB → power amplifier 35RB of volume control, and by acoustic reproduction.
Like this, near sender's audio frequency of user 3A loud speaker 1RB place the audio signal through the music source of decay is reproduced in user 3B ear.
And sender's audio signal of the user 3B that collects at microphone 2B place is provided to partner's audio signal processing unit 20A via the route of amplifier of microphone 21B → low pass filter 22B → commutation circuit 23B → commutation circuit 27B.
Then, in audio signal processing unit 20A, be provided to loud speaker 1LA from the audio signal of audio signal processing unit 20B via the route of commutation circuit 28A → commutation circuit 26A → hybrid circuit 36A → be used for voltage divider 34LA → power amplifier 35LA of volume control, and by acoustic reproduction.
Like this, near sender's audio frequency of user 3B loud speaker 1LA place the audio signal through the music source of decay is reproduced in user 3A ear.
According to top description, and talk can be performed under the hand-free state like the interior lines conversational class between user 3A and the 3B.In this case, for present embodiment, microphone 2A and 2B are disposed in the left ear side of user 3A and the right ear side of user 3B, and be far away so that they are separated by, and therefore, prevents that to what whistle effect is better.
The 5th embodiment (audio system in the car)
The 5th embodiment is the 4th embodiment of extended pattern.The 4th embodiment is the situation that the apparatus, acoustic reproducing with hand-free call function according to the present invention is applied to driver seat and assistant driver seat.The 5th embodiment is assumed to be the four-player of car type and takes car, and wherein, the apparatus, acoustic reproducing with hand-free call function according to the present invention not only is applied to driver seat and assistant driver seat but also is applied to two seat plates (seat sheet) of back row.
Figure 15 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of audio system in the car of the 5th embodiment.Notice that in Figure 15, the assembly identical with the assembly of above-mentioned the 4th embodiment is denoted by the same reference numerals.
In Figure 15, suppose that user 3A is sitting on the driver seat, user 3B is sitting on the assistant driver seat, and user 3C is sitting on the seat of driver seat back, and user 3D is sitting on the seat of assistant driver seat back.Left channel loudspeaker 1LA, 1LB, 1LC and 1LD are attached to the left side of the headrest part (not shown) of the seat that user 3A, 3B, 3C and 3D sat.And right channel loudspeaker 1RA, 1RB, 1RC and 1RD are attached to the right side of the headrest part of the seat that user 3A, 3B, 3C and 3D sat.These left and right acoustic channels loud speakers 1LA, 1LB, 1LC, 1LD and 1RA, 1RB, 1RC, 1RD have exposed speaker configurations.
In the present embodiment, the microphone 2A that is used for collecting sender's audio frequency of sender (user 3A) is disposed in the optional position the relevant null range Zo that boosts of the sound wave that sends with left channel loudspeaker 1LA from the user 3A of driver seat.Similarly, the microphone 2C that is used for collecting sender's audio frequency of sender (user 3C) is disposed in the optional position the relevant null range Zo that boosts of the sound wave that sends with left channel loudspeaker 1LC from the user 3C of the seat of driver seat back.
And the microphone 2B that is used for collecting sender's audio frequency of sender (user 3B) is disposed in the optional position the relevant null range Zo that boosts of the sound wave that sends with left channel loudspeaker 1RB from the user 3B of assistant driver seat.Similarly, the microphone 2D that is used for collecting sender's audio frequency of sender (user 3D) is disposed in the optional position the relevant null range Zo that boosts of the sound wave that sends with left channel loudspeaker 1RD from the user 3D of the seat of driver seat back.
In the present embodiment, microphone 2A, 2B, 2C and 2D also are fixed to the excircle frame part as the vibrating diaphragm of its loud speaker 1LA, 1LC, 1RB and the 1RD of the null range Zo that boosts, and microphone 2A to 2D is disposed among the null range Zo that boosts.
As mentioned above, microphone 2A and 2B or microphone 2C and 2D are positioned to the audio frequency of speaking that the reason that is divided into left and right acoustic channels is the neighboring user of sitting in order to prevent the collection level as far as possible, as mentioned above.Therefore, can improve the effect that prevents in conjunction with the position of microphone 2A to 2D to whistling.
In the present embodiment, carried out such layout: wherein, each of the user of four seats can be appreciated music source separately, carries out conversation with external partners via cellular phone network, and carry out and four seats in one or more talk (interior lines conversation).
Therefore many ConvertBoxs (multi-switching box) 70 are set up, and as shown in figure 16, comprise above-mentioned control unit 40, and comprise respectively audio signal processing unit 20A, 20B, 20C and 20D at user 3A, 3B, 3C and 3D in the seat.In addition, many ConvertBoxs 70 comprise interior lines commutation circuit 71.
As shown in figure 16, be used for carrying out cellular phone terminal 4A, the 4B, 4C and the 4D that converse and can be connected to audio signal processing unit 20A, 20B, 20C and 20D respectively via cellular phone network and external partners.
And, each the audio frequency input/output signal (for example, among Figure 12 at the signal of the interior lines of commutation circuit 27A and 28A conversation side terminal IT place acquisition) of interior lines conversations from audio signal processing unit 20A, 20B, 20C and 20D is provided for interior lines commutation circuit 71.
Interior lines commutation circuit 71 is according to switching the interior lines talk path from the control signal of control unit 40.
As shown in figure 15, action button group 41A, 41B, 41C and 41D are provided for user 3A, 3B, 3C and the 3D in the seat respectively.Operation signal from action button group 41A, 41B, 41C and 41D is provided for the control unit 40 that is included in many ConvertBoxs 70.
Among control unit 40 decision operation button groups 41A, 41B, 41C and the 41D which is operated, and judges which action button in the determined action button group is operated.Then, control unit 40 is carried out control according to its judged result.
In the present embodiment, each among action button group 41A, 41B, 41C and the 41D comprises action button as shown in figure 17.Particularly, be similar to above-mentioned the 4th embodiment, each among action button group 41A, 41B, 41C and the 41D comprises telephone button 61, CD button 62, HDD button 63, broadcasting button 64, volume control knob 65 and talk button 66.In this 5th embodiment, four the partner's designated button 671,672,673 and 674 that interrelate with talk button 66 also are provided, be used to specify the one or more conduct talk objects in other three seats.
Notice that in four partner's designated button, three partner's designated button 671,672 are set in advance so that specify another different seats at each seat with 673.Partner's designated button 674 of the remainder in four partner's designated button is to be used to specify the action button of all other three seats as the partner.
And attend a banquet transducer 43A, 43B, 43C and 43D are provided for the seat of user 3A, 3B, 3C and 3D respectively.The attending a banquet of transducer 43A, 43B, 43C and 43D of attending a banquet detected and exported the control unit 40 that is provided in many ConvertBoxs 70.Control unit 40 is carried out control, so that detect output only to the corresponding audio signal processing unit power supply of the seat of being sat with the user among audio signal processing unit 20A, 20B, 20C and the 20D, to enable its operation based on attending a banquet of attend a banquet transducer 43A, 43B, 43C and 43D.
Audio signal processing unit 20A, 20B, 20C and 20D comprise music source selected cell 32A, 32B, 32C and 32D (not shown) respectively.Therefore, the music source that they utilize action button group 41A, 41B, 41C and 41D to select can be play and appreciate to each of user 3A, 3B, 3C and 3D respectively.
Particularly, for example, when the CD button 62 among the user 3A push button groups 41A, control unit 40 detects this, and the music source selected cell 32A of control audio signal processing unit 20A selects the audio signal from two sound channels of CD Player 31C.And for example, when the HDD button 63 among the user 3B push button groups 41B, control unit 40 detects this, and the music source selected cell 32B of control audio signal processing unit 20B selects the audio signal from two sound channels of HDD 31H.This selector button operation to other user also is suitable for.
And, user 3A, 3B, 3C and 3D can by press the button 61 respectively special-purpose cellular phone terminal 4A, 4B, 4C and the 4D by being connected to audio signal processing unit 20A, 20B, 20C and 20D carry out conversation with the partner via cellular phone network.The operation of this moment is described in the 4th embodiment, therefore, omits the description to it.
In this 5th embodiment, when pressing talk button 66, after pressing one of partner's designated button 671,672 and 673, the talk (interior lines conversation) of the partner on the seat of its partner's designated button appointment that can carry out and be pressed.
For example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses the partner's designated button 671 that is provided to designated user 3B.In this case, 40 pairs of control units are detected by the button push of its user 3A in action button group 41A, and control interior lines commutation circuit 71 (referring to Figure 16) are to connect the interior lines talk path of audio signal processing unit 20A and 20B.Like this, can between user 3A and 3B, carry out talk.
And for example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses partner's designated button 671 that is provided to designated user 3B and the partner's designated button 672 that is provided to designated user 3C.In the case, 40 pairs of control units are detected by the button push of its user 3A in action button group 41A, and control interior lines commutation circuit 71 is to connect the interior lines talk path of three audio signal processing unit 20A, 20B and 20C.Like this, can between user 3A, 3B and 3C, carry out talk.
And for example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses the partner's designated button 674 that is provided to specify all other users.In the case, 40 pairs of control units are detected by the button push of user 3A in action button group 41A, and control interior lines commutation circuit 71 is to connect the interior lines talk path of all audio signal processing unit 20A, 20B, 20C and 20D.Like this, can between user 3A, 3B, 3C and 3D, carry out talk.
Note, in this case, as mentioned above, detect output based on attending a banquet of attend a banquet transducer 43A, 43B, 43C and 43D, it is invalid to be confirmed as at the user's who does not take one's seat talk request.Then, its result is notified to the user of request talk by warning buzzer etc., as mentioned above.Yet, can carry out such layout: wherein,, be not under the situation of the state of taking one's seat, be enabled, and omit buzzer to existing the user that do not take one's seat to notify with the user's who has taken one's seat talk a part of seat user as request and a plurality of people when talking.
In above-mentioned the 5th embodiment, also much less, can obtain advantage fully in the mode identical, and can in playing back music, carry out interior lines conversation (talk) and prevent loud, shrill and long sound with the foregoing description (wherein, conversing with external partners) by cellular phone terminal.
The 6th embodiment
This 6th embodiment also is used as the microphone of the collecting noise example with the situation of reduction environmental externality noise at the microphone that is used for hand-free conversation.When also being used as the music source play mode, collects by the microphone 2 that the sender's audio frequency when particularly, being used for the hand-free call mode is collected the microphone of environmental externality noise.
Figure 18 is the block diagram according to the ios dhcp sample configuration IOS DHCP of the apparatus, acoustic reproducing with hand-free call function of this 6th embodiment.The example of Figure 18 is that this 6th embodiment is applied to the situation in the configuration of the 3rd embodiment shown in Figure 10, and the assembly identical with assembly among Figure 10 represented with identical label.
As shown in figure 18, in the present embodiment, the loud speaker 1L of L channel is the loud speaker that is used for reproducing recipient's audio signal of hand-free call mode.Then, microphone 2L is set at the acoustic pressure null range relevant with the audio frequency that sends from left channel loudspeaker 1L, and this microphone 2L is the microphone that is used for collecting sender's audio signal of hand-free call mode.
Sender's audio signal of collecting at microphone 2 places is provided for the switched terminal (input terminal) of commutation circuit 23M via amplifier of microphone 21L and low pass filter 22.Then, in the present embodiment, be provided to sender's audio input end of cellular phone terminal 4 via audio signal output end 24 from conversation side terminal (output) T of commutation circuit 23M from the audio signal of microphone 2L via low pass filter 22.
And, in the present embodiment, be provided for speech recognition circuit 42 from the audio signal of microphone 2L via the music side terminal (output) of commutation circuit 23M via low pass filter 22.
And in the present embodiment, microphone 2L is used as and is used at the microphone of music source play mode collection with respect to the ambient noise of left channel audio signal.In the present embodiment, for right channel loudspeaker 1R too, microphone 2R is set in the acoustic pressure null range relevant with its audio frequency that is sent.Microphone 2R is used as and is used for the microphone of music source play mode collection with respect to the ambient noise of right channel audio signal.
The external noise that obtains from user 3 ambient noise source, for example, cutting noise (diamondnoise) or engine noise are collected by microphone 2L and 2R.The audio signal of the external noise of changing and obtaining through acoustic-electric in microphone 2L and 2R is provided for low pass filter 81L and 81R via amplifier of microphone 21L and 21R.
Then, the output audio signal of low pass filter 81L and 81R is provided for filter circuit 82L and the 82R that is used for noise reduction respectively, generates the audio signal through noise reduction thus.The audio signal through noise reduction from filter circuit 82L is provided for hybrid circuit 36L, and is provided for loud speaker 1L via the voltage divider 34L and the power amplifier 35L that are used for volume control.
And for R channel, in the present embodiment, hybrid circuit 36R is set at attenuation units 33R and is used between the voltage divider 34R of volume control.The audio signal through noise reduction from filter circuit 82R is provided for hybrid circuit 36R, and is provided for loud speaker 1R via the voltage divider 34R and the power amplifier 35R that are used for volume control.
Based on following former thereby be provided with low pass filter 81L and 81R.That is, as mentioned above, the sound that sends from the front and back of the vibrating diaphragm of exposed loud speaker 1,, more remarkable to neutralization effect from the sound of the front and back of vibrating diaphragm especially for low frequency.Become the component of greatly being decayed to high fdrequency component at acoustic pressure null range Zo the sound that sends from the front and back of the vibrating diaphragm 1C of exposed loud speaker 1, but vanishing fully.
Therefore, in the present embodiment, in order to reduce noise in more guaranteed mode, the noise reduction target is restricted to the low frequency component that only passes through low pass filter 81L and 81R, its noise is almost offset fully in the time of thus in being disposed in above-mentioned acoustic pressure null range Zo, and its vanishing of boosting.Therefore, can carry out noise with stable manner more and reduce, and not whistle.The cut-off frequency of low pass filter 81L and 81R for example is 300Hz or the frequency that is lower than 300Hz, and is set as 300Hz in this example.
Filter circuit 82L and 82R are used to make the audio signal process of external noise anti-phase to generate the audio signal through noise reduction basically.And, filter circuit 82L and 82R consider the external noise sound source location and will stand noise removing user 3 listen to space transfer function between the position (noise removing point) time carry out and proofread and correct, and carry out correction to the characteristic of amplifier of microphone and power amplifier.In this example, filter circuit 82L and 82R are made of digital filter.
Particularly, though omitted in the accompanying drawings, filter circuit 82L and 82R comprise the A/D change-over circuit, are used for will being converted to digital audio and video signals from the simulated audio signal of low pass filter 81L and 81R respectively.Each of filter circuit 82L and 82R comprises the digital filter that for example is made of FIR (finite impulse response) filter, and the FIR filter receives digital audio and video signals from the A/D change-over circuit.In addition, each of filter circuit 82L and 82R comprises and is used for and will be converted to the D/A change-over circuit of simulated audio signal at the processed digital audio and video signals of digital filter.
Be used to make input audio signal through anti-phase value and the value that is used to proofread and correct above-mentioned space transfer function, and the characteristic of amplifier of microphone 21L and 21R and power amplifier 35L and 35R is provided as the filter factor of the digital filter among filter circuit 82L and the 82R.
Note, in the present embodiment, as mentioned above, the noise reduction target is limited to low frequency component, do not have the zone of sense of direction (sense of direction) yet this low frequency component audio region is the mankind, therefore, can omit the correction of passing through the space transfer function by above-mentioned filter circuit 82L and 82R.Therefore, can carry out such layout: wherein, negative circuit only is set, and filter circuit 82L and 82R among Figure 18 are not set.Yet, in considering the situation that the characteristic execution of above-mentioned amplifier of microphone 21L and 21R and power amplifier 35L and 35R is proofreaied and correct, need in its correcting range, provide filter circuit 82L and 82R.
According to above-mentioned configuration, send sound through noise reduction from loud speaker 1L and 1R.Here, the audio signal through noise reduction is by making the anti-phase signal that obtains of audio signal process of external noise, therefore, becoming the sound of the phase place through reversing with external noise Nz through the sound of noise reduction.Therefore, external noise and have its external noise through around the sound of noise reduction ear, being synthesized of the phase place of counter-rotating user 3, therefore, the sound that provides external noise to be lowered or to eliminate.
Denoising device with the configuration among Figure 18 is the denoising device according to so-called feed forward method.With the relevant noise reduction operation of describe adopting with reference to the transfer function of Figure 19 according to the denoising device of feed forward method.Figure 19 is the corresponding block diagram of piece with noise reduction process system shown in Figure 180, and adopts its transfer function to represent each unit.
In Figure 19, A represents the transfer function of power amplifier 35L and 35R, and D represents as the loud speaker 1L of driver and the transfer function of 1R, and M represents the corresponding transfer function of part with microphone 2L and 2R and amplifier of microphone 21L and 21R.And-α is expressed as the noise reduction of feed forward method and the transfer function of the filter that designs, and has comprised the effectiveness of phasing back.And F represents from the position of external noise source near the space transfer function of the position of the elimination point listener's ear.When representing as shown in Figure 19, the transfer function of supposing noise is N, and the acoustic pressure P at the elimination point place around user's 3 ears when then utilizing the denoising device of the piece configuration with Figure 18 is expressed as follows.
P=-ADM α N+FN+ADS ... (expression formula 1)
Now, if our hypothesis space transfer function F is expressed as follows
F ≅ ADMα ... (expression formula 2),
That is, the transfer function of filter circuit 13 is designed to be satisfied (expression formula 2), and then Shang Mian (expression formula 1) is expressed as follows.
P ≅ ADS ... (expression formula 3)
Therefore, the acoustic pressure P that eliminates the some place becomes the acoustic pressure that noise is eliminated, and only has music source S.In (expression formula 3),, that is, there is not music source, then if we are hypothesis music source S=0 P ≅ 0 Set up, this means that the acoustic pressure P that eliminates the some place is the acoustic pressure that noise is eliminated and is disappeared and.
Identical among other operation except noise cancellation operation and above-mentioned the 3rd embodiment and obtained aforesaid operating effect.
The 7th embodiment
The hardware configuration example of the 7th embodiment
Figure 20 is used to describe the diagrammatic sketch that has the apparatus, acoustic reproducing hardware configuration example in the present embodiment of hand-free call function according to of the present invention.
The apparatus, acoustic reproducing with hand-free call function 10 according to present embodiment shown in Figure 20 has the acoustic reproduction pattern, wherein, from such as the dish medium of CD (compact disk) etc. or from such as music source of the memory device of hard disk etc. etc. by acoustic reproduction.And the apparatus, acoustic reproducing 10 with hand-free call function has the hand-free call function, and wherein, in the acoustic reproduction pattern, the loud speaker that is used for the acoustic reproduction music source by utilization is carried out the hand-free conversation.
The configuration of loud speaker
Be used for having so-called 3D system speaker configuration according to the loud speaker of the acoustic reproduction of the apparatus, acoustic reproducing with hand-free call function 10 of present embodiment, the 3D system is by the subwoofer that is used for the low pitch audio reproduction (subwoofer) and is used for the left and right sides two-way speaker that higher pitch sounds reproduces and constitutes.In the present embodiment, three of the 3D system loud speakers are configured so that be attached to the headrest part of the seat that the user sits.
In Figure 20,1W represents to be used for the subwoofer of low pitch audio reproduction, and has constituted the example of first loud speaker.As described later, in the present embodiment, subwoofer 1W is the loud speaker that is used for sending at the hand-free call mode recipient's audio frequency of the partner that converses certainly.
And 2L and 2R represent to be used for the left and right sides two-way speaker that higher pitch sounds is reproduced.For present embodiment, in two loud speaker 2L and 2R, loud speaker 2L has constituted the example of second loud speaker.As described later, in the present embodiment, loud speaker 2L is configured so that switch to the microphone that is used for collecting at the hand-free call mode sender's audio frequency of user 3.
In the present embodiment, shown in Figure 21 A and 21B, subwoofer 1W and loud speaker 2L and 2R are set at the part that the headrest 11 of the seat of being sat with user 3 10 is equal to.Figure 21 A is the diagrammatic sketch of the seat 10 that user 3 is sat when its oblique front face side is seen, and the diagrammatic sketch of the seat 10 that Figure 21 B is the user 3 when rear side is seen to be sat.
In the present embodiment, subwoofer 1W has exposed speaker configurations.Particularly, subwoofer 1W has such configuration, and wherein, loudspeaker unit is not deposited by in the loudspeaker enclosure, and is not attached to reflecting plate.
Shown in Figure 21 A and 21B, subwoofer 1W is fixed to headrest 11, and in this example, headrest 11 is just in the position of user 3 head back when user 3 is sitting on the seat 10.
In the present embodiment, headrest 11 is configured to by insert/extract plug/unplug formula stem portion 11a and 11b in the headrest attachment hole 12a at the back 12 of seat 10 and 12b detachable with respect to seat 10.Subwoofer 1W by extending to headrest 11 from plug/unplug formula stem portion 11a and 11b attachment hole 12a and the loud speaker retained part 11c of 12b and 11d is held and fixing.
And headrest 11 comprises bend arm part 13, and it can bend towards the vibrating diaphragm side of subwoofer 1W from loud speaker retained part 11c and 11d.Shown in Figure 21 A and 21B, bend arm part 13 has the U character shape, and is configured so that its U-shaped arm of the vibrating diaphragm side by bending towards subwoofer 1W comes flexiblely clamping user 3 head.
In the situation of present embodiment, the U character shape of the bending of bend arm part 13 partly is configured so that be positioned at the position of the ledge preset distance on the vibrating diaphragm side of leaving subwoofer 1W.Carried out such layout, wherein, the U character shape of the bending by bend arm part 13 partly prevents user 3 head and subwoofer 1W collision.In addition, bend arm part 13 disposes the head of supporting user 3 fully by it.
Utilization has the subwoofer 1W of exposed speaker configurations, and as shown in figure 22, sound wave Sf that sends from the place ahead of its loudspeaker unit vibrating diaphragm and the sound wave Sb that sends from its rear are in admixture.Here, from the phase place (referring to (A) Fig. 5) of the sound wave Sf that sends previously of the vibrating diaphragm of loudspeaker unit and become inverting each other from the phase place (referring to (C) Fig. 5) of the sound wave Sb that sends later of vibrating diaphragm.Therefore, comprising that than being parallel in the zone of the excircle end more lateral of the vibrating diaphragm of subwoofer 1W graphic memory than the plane of the excircle end of the vibrating diaphragm of subwoofer 1W is at a regional Zo, in the Zo of this zone, the sound that sends from the front and back of its vibrating diaphragm is mixed and be cancelled (referring to (B) Fig. 5), and acoustic pressure is almost nil.After this, acoustic pressure is almost nil regional Zo is called acoustic pressure null range Zo.
Can when utilizing exposed loudspeaker reproduction audio frequency, collect the sound wave that sends from exposed loud speaker, confirm this acoustic pressure null range Zo by microphone.Figure 22 with dashed lines 5 shows this zone.
In the present embodiment, loud speaker 2L and 2R are disposed in the optional position of acoustic pressure null range Zo of subwoofer 1W.As mentioned above, loud speaker 2L is configured so that also be used as microphone, and therefore, the loud speaker that is used for collecting sender's audio frequency of sender (user 3) is disposed in the acoustic pressure null range Zo relevant with the audio frequency that sends from subwoofer 1W.
In actual use, the tabular surface of excircle frame part that comprises the vibrating diaphragm of subwoofer 1W becomes acoustic pressure null range Zo, therefore, in the present embodiment, loud speaker 2L and 2R are attached to loud speaker retained part 11c and the 11d of clamping subwoofer 1W.In the present embodiment, loud speaker 2L and 2R also have exposed speaker configurations.
In the present embodiment, in the acoustic reproduction pattern, shown in (A) among Figure 23, wish the vibration plane of the vibrating diaphragm of the loud speaker 2L at the two ends of the headrest 11 that will be attached to the seat 10 that user 3 sat and 2R is arranged, so that respectively in the face of user's left ear side and right ear side.This is because can be provided for the user near the ear the user through the audio frequency of being launched of acoustic reproduction effectively, so the audio signal of low pitch acoustic pressure should be sent from loud speaker 2L and 2R, and the sound that is leaked to other people can be reduced.
For the example in Figure 23 (A), for the left right ear side of the vibration plane user oriented 3 of the vibrating diaphragm that makes loud speaker 2L and 2R, for example, the vibration plane of its vibrating diaphragm is disposed in tilt state about 45 degree of lengthy motion picture direction with respect to headrest 11.
On the other hand, in the hand-free call mode, shown in (B) among Figure 23, hope will be arranged among the acoustic pressure null range Zo about subwoofer 1W by switching the loud speaker 2L also be used as microphone.In this case, in loud speaker 2L was disposed in about the state among the acoustic pressure null range Zo of subwoofer 1W, the direction of the vibrating diaphragm of loud speaker 2L was equal to the direction of the vibrating diaphragm of subwoofer 1W.
And, in the acoustic reproduction pattern, shown in (A) among Figure 24, wish loud speaker 2L and 2R are arranged near the ear of the user left and right sides height and position, can be pressed lowlyer from the output acoustic pressure of its loud speaker 2L and 2R thus.
On the other hand, when the hand-free call mode, loud speaker 2L is switched to the microphone of the sender's audio frequency that is used to collect the user, therefore, shown in (C) among Figure 24, wishes loud speaker 2L is arranged near user's mouth height and position.That is, wish loud speaker 2L mobile d on height and position.
Note, (B) among Figure 24 and (C) and (A) among Figure 23 and (B) similar, illustrate when the acoustic reproduction pattern and during the hand-free call mode vibrating diaphragm of loud speaker 2L and 2R with respect to user 3 direction.Notice that in Figure 23, oval dashed line view shows sound wave that sends forward from subwoofer 1W and the sound wave that sends backward.
In the present embodiment, when considering above-mentioned situation, at least loud speaker 2L is configured so that moved by loud speaker travel mechanism, and loud speaker travel mechanism is used for making loud speaker 2L all to be in proper state in every kind of pattern of acoustic reproduction pattern and hand-free call mode.
Particularly, at first, loud speaker 2L is attached to headrest 11 to rotate removable mode, so that be arranged in following two states: the vibration plane of its vibrating diaphragm is towards the state of two ear directions of the user 3 who is sitting in seat 10, with and the vibration plane of vibrating diaphragm towards the direction identical with the vibrating diaphragm of subwoofer 1W.Two types the direction of this moment is as (B) among Figure 24 with (D).
And, secondly, loud speaker 2L with on short transverse movably mode be attached to headrest 11 so that be positioned at following two states: loud speaker 2L is disposed in the side of left ear of the user 3, and loud speaker 2L is disposed in the side of user 3 mouth.This direction of two types of this moment is as (A) among Figure 24 with (C).
Notice that in the present embodiment, loud speaker 2L is used as microphone by switching separately, therefore, for loud speaker 2R, needn't provide aforesaid travel mechanism.Yet, in some cases, suppose that loud speaker 2R replaces loud speaker 2L to be used as microphone by switching, for present embodiment, is provided with travel mechanism with respect to two loud speaker 2L and 2R.
Loud speaker travel mechanism
Figure 25 and 26 illustrates the example of loud speaker travel mechanism.In this example, in headrest 11,, and provide the 50R of loud speaker travel mechanism for loud speaker 2R for loud speaker 2L provides the 50L of loud speaker travel mechanism.50L of loud speaker travel mechanism and 50R are set to loud speaker retained part 11c and 11d respectively and are used for clamping subwoofer 1W.
50L of loud speaker travel mechanism that Figure 25 sees directly over the seat 10 and the diagrammatic sketch of 50R.And Figure 26 is a diagrammatic sketch of describing the detailed configuration of the loud speaker 50L of travel mechanism.Notice that the 50R of loud speaker travel mechanism has the configuration with the 50L of loud speaker travel mechanism symmetry, therefore, the basic configuration between them is identical, and omits its detailed configuration.
In Figure 26, motor 51L for example is made of such stepper motor, and this stepper motor is used to make the direction of loud speaker 2L for example to change in the scope of miter angle, and is aforesaid.And motor 52L for example is made of such stepper motor, and this stepper motor is used for the height and position of loud speaker 2L displacement d between the position of the lateral location of user's ear and user's mouth, as mentioned above.
Loud speaker clamping components 54L is fixed to the rotating shaft 53L of motor 51L.Loud speaker 2L is attached to loud speaker clamping components 54L.Therefore, when motor 51L was driven in rotation, the loud speaker clamping components 54L that is fixed to rotating shaft 53L was the center is rotated the anglec of rotation of mobile rotating shaft 53L on the direction of rotation of rotating shaft 53L a amount with rotating shaft 53L.
Motor 51L is accommodated among the short transverse sliding component 55L.The rotating shaft 56L of motor 52L is passed (thread), and short transverse sliding component 55L is spun on the rotating shaft 56L of motor 52L.Motor 52L is set among the fixed component 57L.In order to prevent that short transverse sliding component 55L from rotating along with the rotation of rotating shaft 56L, pilot pin 58L is passed short transverse sliding component 55L and is fixed to fixed component 57L.
According to this configuration, when motor 52L was driven in rotation, the short transverse sliding component 55L that is spun on this rotating shaft 56L moved in the mode of vertical slip according to rotating shaft 56L, did not rotate mobile owing to pilot pin 58L.
In the present embodiment, the loud speaker mobile member 50L among Figure 26 is received and is arranged among the loud speaker retained part 11d of headrest 11 subwoofer 1W.
Motor 51L and 52L stand the rotation drive controlling of the mobile control signal of rotation of the described loud speaker 2L from control unit 40 in back.In this case, motor 51L is by about the control of the rotation control signal of motor 51L, and the direction of loud speaker 2L is by changing according to the direction of rotation of its rotation control signal and the anglec of rotation and controlling.And motor 52L is by about the control of the rotation control signal of motor 52L, and short transverse sliding component 55L moves with sliding type on short transverse according to the direction of rotation of its rotation control signal.
Particularly, when the acoustic reproduction pattern was changed to the hand-free call mode, control unit 40 offered motor 51L rotating shaft 53L is rotated in the counterclockwise direction 45 degree with rotation control signal.Like this, loud speaker clamping components 54L is that 45 degree are moved at the center with being rotated in the counterclockwise direction from the state of acoustic reproduction pattern (wherein, the face of excircle framework that comprises the vibrating diaphragm of loud speaker 2L constitutes miter angle with respect to the face of the excircle framework of the vibrating diaphragm that comprises subwoofer 1W) with rotating shaft 53L.Therefore, comprise that the face of excircle framework of the vibrating diaphragm of loud speaker 2L is parallel to the face of the excircle framework of the vibrating diaphragm that comprises subwoofer 1W, and loud speaker 2L is disposed among the acoustic pressure null range Zo about subwoofer 1W.
On the contrary, when the hand-free call mode was changed to the acoustic reproduction pattern, control unit 40 offered motor 51L rotating shaft 53L is rotated in the clockwise direction 45 degree with rotation control signal.Like this, loud speaker 2L turns back to the state (wherein, the face of excircle framework that comprises the vibrating diaphragm of loud speaker 2L constitutes miter angle with respect to the face of the excircle framework of the vibrating diaphragm that comprises subwoofer 1W) of acoustic reproduction pattern.
And when the acoustic reproduction pattern was changed to the hand-free call mode, control unit 40 offered motor 52L with rotation control signal, so that short transverse sliding component 55L is reduced apart from d.Therefore, short transverse sliding component 55L moves with sliding type so that the next door of user's mouth is come in the center of loud speaker 2L.
On the contrary, when the hand-free call mode was changed to the acoustic reproduction pattern, control unit 40 offered motor 52L with rotation control signal, so that short transverse sliding component 55L is raise apart from d.Therefore, short transverse sliding component 55L moves with sliding type so that the user's ear next door is come in the center of loud speaker 2L.
Top description is the description about the 50L of loud speaker travel mechanism, yet except the 50R of loud speaker travel mechanism was configured with symmetric mode with respect to the 50L of loud speaker travel mechanism, the 50R of loud speaker travel mechanism also was configured in identical mode.Note, in Figure 25, the assembly utilization of the 50R of loud speaker travel mechanism by its suffix L is changed into after the suffix R with represent corresponding to the identical label of the assembly of the 50L of loud speaker travel mechanism.In the present embodiment, the 50R of loud speaker travel mechanism is by being set up among the loud speaker retained part 11c that is accommodated in headrest 11 subwoofer 1W.
Description to signal processing system
Next, will configuration according to the signal processing system of the apparatus, acoustic reproducing with hand-free call function of present embodiment be described with reference to Figure 20.
According to the apparatus, acoustic reproducing with hand-free call function of present embodiment by constituting with lower unit: audio signal processing unit 20, as music source unit 30, control unit 40, action button group 41 and the cellular phone terminal 4 of audio signal generation unit.
Audio signal processing unit 20 comprises the commutation circuit 21,22,23,24 and 25 that can switch between acoustic reproduction pattern and hand-free call mode.According to the mode switching signal from control unit 40, these commutation circuits 21 to 25 are switched to terminal M side when the acoustic reproduction pattern, and are switched to terminal T side when the hand-free call mode.
In the present embodiment, music source unit 30 comprises CD (compact disk) player 31C, hard disk drive (after this, being abbreviated as HDD) 31H and broadcast reception unit 31B.When CD was loaded onto among the CD Player 31C, CD Player 31C decoded to binaural audio signal and with its output.The music data of a large amount of music contents is stored among the HDD 31H, and when it was selected, HDD 31H decoded music data was with the output binaural audio signal.Broadcast reception unit 31B for example can receive AM audio broadcasting, FM audio broadcasting, television broadcasting etc., and the broadcast audio that receives is output as binaural audio signal.
In the present embodiment, the audio signal from the left and right acoustic channels of CD Player 31C, HDD 31H and broadcast reception unit 31B is provided for audio signal processing unit 20.
In audio signal processing unit 20, be imported into the source from the audio signal of two sound channels of CD Player 31C, HDD 31H and broadcast reception unit 31B and select circuit 32.
As shown in Figure 9, action button group 41 comprises the selector button such as telephone button 61, CD button 62, HDD button 63, broadcasting button 64 etc., and volume control knob 65.Be provided for control unit 40 with the corresponding operation signal of the push-botton operation of user on action button group 41.
Notice that except aforesaid selector button, action button group 41 also comprises so-called repeat playing and the shuffle for CD Player 31C and HDD 31H, and for the broadcasting channel selector button of broadcast reception unit 31B etc.Yet,, will omit illustrating and describing about these buttons in order to simplify description.
The control unit 40 that for example constitutes by microcomputer mounted thereto generate with the user to the corresponding control signal of the push-botton operation of action button group 41, and provide it to the necessary unit of music source unit 30 and audio signal processing unit 20.
When operation telephone button 61 in the acoustic reproduction pattern, control unit 40 determines that the acoustic reproduction pattern is switched to the hand-free call mode, and mode switching signal is offered commutation circuit 21 to 25.Then, control unit 40 offers motor 51L and 52L according to this mode switch with aforesaid rotation control signal.
And when detecting one of selector button such as CD button 62, HDD button 63, broadcasting button 64 etc. be operated in hand-free call mode state, control unit 40 is determined that the hand-free call modes are changed and is the acoustic reproduction pattern.Then, determine the result based on this, control unit 40 offers commutation circuit 21 to 25 with mode switching signal, and aforesaid rotation control signal is offered motor 51L, 52L, 51R and 52R.
Notice that in the hand-free call mode according to present embodiment, the switching of the state that is not performed to the broadcast of music source is performed.Then, loud speaker 2L is used as microphone, and is used to collect sender's audio frequency of user 3, and subwoofer 1W also is used to collect recipient's audio frequency of conversation partner.
When being pressed about the selector button of music source such as CD button 62, HDD button 63, broadcasting button 64 etc. in the music source play mode, control unit 40 is selected signal to offer the source in the source and is selected circuit 32.
The source selects circuit 32 to select the control of signal-selectivity ground by its source, and carries out and select control so that select and the corresponding music source of selector button that is pressed.For example, when CD button 62 is pressed, the audio signal of two sound channels about the source selects circuit 32 optionally to export from CD Player 31C.Similarly, the source selects circuit 32 when HDD button 63 is pressed, the audio signal of two sound channels from about the HDD 31H output optionally, and when broadcasting button 64 is pressed from about the broadcast reception unit 31B output audio signal of two sound channels.
In the audio signal of two sound channels selecting circuit 32 from the source, the audio signal of L channel is provided for high pass filter 33L, and high fdrequency component is extracted out.Then, the acoustic reproduction pattern side terminal M (input) that is provided for the commutation circuit 21 that is used for mode switch via voltage divider 34L that is used for volume control and power amplifier 35L from the high fdrequency component of the left channel audio signal of high pass filter 33L.In the acoustic reproduction pattern, the audio signal of locating to obtain in the switched terminal (I/O end) of commutation circuit 21 is provided for loud speaker 2L, and by acoustic reproduction.
And, select the right channel audio signal in the audio signal of two sound channels of circuit 32 to be provided for high pass filter 33R from the source, and high fdrequency component is extracted out.Then, be provided for the acoustic reproduction pattern side terminal M (input) of the commutation circuit 25 that is used for mode switch from the high fdrequency component of the right channel audio signal of high pass filter 33R.
Hand-free call mode side terminal T (input) ground connection of commutation circuit 25.And the audio signal of locating to obtain in the switched terminal (output) of commutation circuit 25 is provided for loud speaker 2R via the voltage divider 34R and the power amplifier 35R that are used for volume control, and by acoustic reproduction.
And, select the audio signal of two sound channels of circuit 32 to be provided for low pass filter 36L and 36R respectively from the source, and low frequency component is extracted out.The low frequency component of the audio signal of two sound channels that obtain from low pass filter 36L and 36R is provided for add circuit 37, and is added at this.The output audio signal of add circuit 37 is provided for the acoustic reproduction pattern side terminal M (input) of commutation circuit 24.As described later, be provided for the hand-free call mode side terminal T (input) of commutation circuit 24 from recipient's audio signal of conversation partner.
Then, the audio signal of locating to obtain in the switched terminal (output) of commutation circuit 24 is provided for subwoofer 1W by voltage divider 34W and the power amplifier 35W that is used for volume control, and by acoustic reproduction.
In this case, loud speaker 1W, 2L and 2R are disposed near the user's ear, and therefore, the volume of the call voice that sends from loud speaker 1W, 2L and 2R can be suppressed.Therefore, even user 3 listens to music with big relatively volume, also can reduce the sound that is leaked to other people.
Next, will the treatment system of the audio signal of hand-free conversation be described.Commutation circuit 21 is connected to the voice coil loudspeaker voice coil (voice coil) of loud speaker 2L, and when the acoustic reproduction pattern, audio signal is provided for loud speaker 2L, and its loud speaker 2L is as electro-acoustic transducing device thus.
On the other hand, when the hand-free call mode, commutation circuit 21 is switched to hand-free call mode side terminal T, and the state that obtains audio signal from loud speaker 2L is provided thus.That is, when the hand-free call mode, loud speaker 2L is used as electro-acoustic transducing device, that is, and and microphone.Then, in the present embodiment, according to the loud speaker 2L that is switched to microphone, the call voice that user 3 says is collected, and changes with generation call voice signal through acoustic-electric, and this signal is transfused to audio signal processing unit 20.
Then, in audio signal processing unit 20, from being provided for amplifier of microphone 26 as the audio signal of loud speaker (microphone) 2L of the acoustical-electrical transducer spare hand-free call mode side terminal T by commutation circuit 21.Then, the audio signal that is exaggerated in amplifier of microphone 26 is provided for low pass filter 27.
In the present embodiment, low pass filter 27 is according to following former thereby be set up.Particularly, the sound that sends from the front and back of the vibrating diaphragm of subwoofer 1W (exposed loud speaker),, be significant to the neutralization effect of the sound that sends from the front and back of vibrating diaphragm especially for low frequency.
Therefore, in the present embodiment, in order to make conversation to carry out to guarantee the mode that does not have to whistle with being stabilized, according to low pass filter 27, the component of the sound that sends from the front and back of the vibrating diaphragm of subwoofer 1W only is restricted to the call voice band component, when microphone was disposed among the above-mentioned acoustic pressure null range Zo, boosting of call voice band component almost completely was cancelled and vanishing.Be in the example, the cut-off frequency of low pass filter 27 for example is set as 2kHz.The cut-off frequency of low pass filter 27 depends on the environment for use of Handless unit and difference, and for example, and can to conceive cut-off frequency be 1kHz or be lower than 1kHz.
Note, depend on the type of cellular phone terminal or to the method for attachment of its cellular phone terminal, amplifier of microphone 26 and low pass filter 27 can be omitted.
The output audio signal of low pass filter 27 is provided for the hand-free call mode side terminal T (input) of commutation circuit 22.In the present embodiment, acoustic reproduction pattern side terminal M (input) ground connection of commutation circuit 22.
In the present embodiment, the switched terminal of commutation circuit 22 (output) is connected to sender's audio input end of cellular phone terminal 4 by audio signal output end 28.That is, sender's audio signal of the user 3 who collects at the microphone place is provided for sender's audio input end of cellular phone terminal 4.
And, be imported into audio signal processing unit 20 from recipient's audio output of cellular phone terminal 4 via audio signal input end 29 from recipient's audio signal of conversation partner.
Be provided for the hand-free call mode side terminal T (input) of commutation circuit 23 via recipient's audio signal of audio signal input end 29 inputs.In the present embodiment, acoustic reproduction pattern side terminal M (input) ground connection of commutation circuit 23.Then, the switched terminal of commutation circuit 23 (output) is connected to the hand-free call mode side terminal T of commutation circuit 24.
Therefore, be provided for subwoofer 1W from recipient's audio signal of conversation partner via commutation circuit 24, the voltage divider 34W and the power amplifier 35W that are used for volume control from what cellular phone terminal 4 sent.
In this case, subwoofer 1W is disposed near the user of user's back head, and therefore, the sound that sends from subwoofer 1W can be depressed less output volume.
When volume control knob 65 is operated by the user, be used for voltage divider 34L, the 34R of volume control and 34W and be used for being provided for the volume of each audio signal of loud speaker 2L, 2R and subwoofer 1W according to its operation control.
Particularly, when the user for example with volume control knob 65 during to right rotation, control unit 40 detects this as and improves the volume operation.Then, control unit 40 control is used for voltage divider 34L, the 34R of volume control and 34W the volume that is provided for each audio signal of loud speaker 2L, 2R and subwoofer 1W is improved the corresponding amount of rotation amount with volume control knob 65.
And, when the user for example with volume control knob 65 during to anticlockwise, control unit 40 detects this as and reduces the volume operation.Then, control unit 40 control is used for voltage divider 34L, the 34R of volume control and 34W the volume that is provided for each audio signal of loud speaker 2L, 2R and subwoofer 1W is reduced the corresponding amount of rotation amount with volume control knob 65.
Note, in the present embodiment, the number of volume control knob 65 is one, and according to the operation to an one volume control knob 65, and volume is controlled at that the mode with interlocking (interlock) is performed between the voltage divider 34L, the 34R that are used for volume control and the 34W.Yet, can carry out such layout: wherein, provide volume control knob to the voltage divider 34L, the 34R that are used for volume control and each of 34W, and independent each volume of control.
Description to the operation among the 7th embodiment
In the acoustic reproduction pattern, each of commutation circuit 21 to 25 all is switched to acoustic reproduction pattern side terminal M.
Therefore, this state is such state: wherein, audio signal is provided for loud speaker 2L from commutation circuit 21, and loud speaker 2L is switched to as electro-acoustic transducing device, i.e. the state of loud speaker.And it is distolateral that commutation circuit 22 and 23 is switched to ground connection, and the voice frequency signalling system of hand-free conversation is closed.
And loud speaker 2L and 2R are set at height and position and are arranged in user 3 the state on ear next door (shown in (A) among Figure 24), and are set in the state of its vibrating diaphragm facing to the ear direction.
In the acoustic reproduction pattern, from the music source of music source unit 30 by loud speaker 2L, 2R and subwoofer 1W acoustic reproduction.Output volume changes by the operation to the volume control knob 65 of action button group 41.And the CD button 62 of action button group 41, HDD button 63, broadcasting button 64 etc. are operated, and change the source of the binaural audio signal that sends from music source unit 30 thus.
For example, have in cellular phone terminal 4 when the acoustic reproduction pattern in the situation of the calling of entering, for present embodiment, the user carries out in cellular phone terminal 4 and (for example enters the call operation, off-hook is operated), and the telephone button 61 of push button groups 41.And, carry out to the conversation partner from cellular phone terminal 4 user 3 and to go out to call out when carrying out the hand-free conversation, for present embodiment, user 3 carries out the call operation of going out to the conversation partner in cellular phone terminal 4, and presses telephone button 61.
When the telephone button 61 in user's push button groups 41, control unit 40 detects the processing that switches to the hand-free call mode with execution to this.
At first, control unit 40 rotation control signal is offered motor 51L, 52L, 51R and 52R each loud speaker 2L and 2R have been moved to the height and position of user 3 mouth, and they are moved among the acoustic pressure null range Zo about subwoofer 1W.Meanwhile, control unit 40 offers commutation circuit 21 to 25 so that each switches to hand-free call mode side terminal T with them with switch-over control signal.
And loud speaker 2L is switched to microphone.Sender's audio signal of the user's 3 who collects at microphone 2L place the audio frequency of speaking is provided for cellular phone terminal 4 by amplifier of microphone 26, low pass filter 27, commutation circuit 22 and audio signal output end 28.Therefore, sender's audio signal of user 3 is sent to the conversation partner by cellular phone network via cellular phone terminal 4.
And the recipient's audio signal from the partner that receives at cellular phone terminal 4 places is imported into audio signal processing unit 20 via audio signal input end 29.Be provided for subwoofer 1W from recipient's audio signal of partner by commutation circuit 23 and 24, the voltage divider 34W and the power amplifier 35W that are used for volume control.Therefore, recipient's audio signal is by subwoofer 1W acoustic reproduction.
Note, in the present embodiment, to entering the call operation and the call operation of going out is handled by in cellular phone terminal 4, carrying out respectively to the response that enters calling of cellular phone terminal 4 and the call operation of going out.
Yet, under cellular phone terminal 4 comprises situation with the splicing ear of computer, have such hand-free kit (kit), this hand-free kit adopts its splicing ear to realize registered partner's the automatic call entry/terminated call and the call function of going out under the situation that button is touched by single.Therefore, this hand-free kit function is included in the control unit 40, and thus, control unit 40 obviously can be carried out the function such as automatic call entry/terminated call etc.
Figure 27 is the flow chart that is used to describe the control operation of being undertaken by control unit 40 when from the acoustic reproduction mode switch to the hand-free call mode.
Control unit 40 monitoring phone buttons 61 whether be pressed (step S101).Then, judging under the situation that telephone button 61 is not pressed, control unit 40 in the acoustic reproduction pattern, carries out with to CD button 62, HDD button 63, broadcast the corresponding control of operation (step S102) of button 64, volume control knob 65 etc.After this step S102, handle turning back to step S101.
When judging that in step S101 telephone button 61 is pressed, control unit 40 offers motor 51L with rotation control signal and 51R changes and the direction of mobile loud speaker 2L and 2R so that in the face of the acoustic pressure null range Zo (step S103) of subwoofer 1W.And, control unit 40 offers motor 52L with rotation control signal and 52R changes and the height and position of mobile loud speaker 2L and 2R so that be positioned at user 3 mouth height and position (step S104).
In addition, control unit 40 switches to hand-free call mode side terminal T (step S105) with commutation circuit 21 to 25 from acoustic reproduction pattern side terminal M.
Then, control unit 40 judges whether the hand-free call mode finishes (step S106).The judgment processing of control unit 40 is to judge by control unit 40 whether user 3 presses telephone button 61 once more among the step S106, and perhaps whether user 3 presses that one of selector button such as CD button 62, HDD button 63, broadcasting button 64 or the like carries out.
When judging that the hand-free call mode has been finished in step S106, control unit 40 is carried out the following processing that is used to switch to the acoustic reproduction pattern.Particularly, at first, control unit 40 offers motor 52L with rotation control signal and 52R changes and the height and position of mobile loud speaker 2L and 2R so that be positioned at the height and position (step S107) of user's 3 ears.
Next, control unit 40 rotation control signal is offered motor 51L and 51R changes and the direction of mobile loud speaker 2L and 2R so that the direction (step S108) of user oriented 3 ears.In addition, control unit 40 switches to acoustic reproduction pattern side terminal M (step S109) with commutation circuit 21 to 25 from hand-free call mode side terminal T.After this step S109, handle and return step S101.
Notice that as mentioned above, in cellular phone terminal 4 comprised situation with the splicing ear of computer, can carry out such layout: wherein, control unit 40 can be based on the end that detects the conversation in the cellular phone terminal 4 by the information of its splicing ear.In this case, during the end of conversation, in step S106, control unit 40 is determined the end of hand-free call modes, and switches to the acoustic reproduction pattern in detecting cellular phone terminal 4.In this case, in the acoustic reproduction pattern after switching, handle and may be advanced to the selecteed state in predetermined music source, perhaps can turn back to the next-door neighbour and be changed to hand-free call mode state before.
Therefore, in the hand-free call mode, send from subwoofer 1W from recipient's audio frequency of partner, and sender's audio frequency of user is collected by the microphone (loud speaker 2L) among the acoustic pressure null range Zo that is arranged in subwoofer 1W.
Therefore, can carry out the hand-free conversation when taking place preventing to whistle.Subwoofer 1W has exposed speaker configurations, and is disposed near the user, and therefore, original sound emission output volume (boosting) can be less.For present embodiment, be disposed in the combination of the acoustic pressure null range Zo of subwoofer 1W according to this advantage and the microphone (loud speaker 2L) of the sender's audio frequency that is used for collecting user 3, can when fully preventing to whistle, carry out the hand-free conversation.
Press telephone button 61 user 3 and call out going out and send to the conversation partner from cellular phone terminal 4 and attempt carrying out the situation of hand-free conversation, when the conversation partner responded this, the hand-free conversation can be performed, as mentioned above.
The 8th embodiment
For above-mentioned the 7th embodiment, in the hand-free call mode, be closed from the audio frequency of music source unit 30.Yet, in the hand-free call mode, can when listening to, carry out conversation from the audio frequency of music source unit 30.This 8th embodiment is the embodiment that enables the apparatus, acoustic reproducing with hand-free call function in the situation of hand-free conversation when being in the audio frequency of listening to from music source unit 30.
Figure 28 illustrates the hardware configuration example according to the apparatus, acoustic reproducing with hand-free call function of this 8th embodiment.In Figure 28, be denoted by the same reference numerals with assembly identical in the apparatus, acoustic reproducing according to above-mentioned the 7th embodiment with hand-free call function.
In this 8th embodiment, the commutation circuit 24 and 25 according to the 7th embodiment is not set.In this 8th embodiment, replace commutation circuit 24 and 25 and be removed, with respect to selecting the audio signal of the left and right acoustic channels of circuit 32 to be provided with attenuation units 38L and 38R from the source.In addition, in this 8th embodiment, provide the recipient's audio signal that is used for from the conversation partner to be mixed into and to be provided for the hybrid circuit 39 of the audio signal of subwoofer 1W.Notice that attenuation units 38L and 38R make and listen to recipient's audio frequency easily when hand-free is conversed, rather than indispensable.
Select the audio signal of the L channel in the audio signal of two sound channels of circuit 32 to be provided for high pass filter 33L and low pass filter 36L via attenuation units 38L from the source.And, select the audio signal of the R channel in the audio signal of two sound channels of circuit 32 to be provided for high pass filter 33R and low pass filter 36R via attenuation units 38R from the source.
Then, by being used for voltage divider 34L, the power amplifier 35L of volume control, and be provided for the loud speaker 2L of the high frequency that is used for L channel in addition via the acoustic reproduction pattern side terminal M of commutation circuit 21 from the high fdrequency component of the left channel audio signal of high pass filter 33L.
And, from the high fdrequency component of the right channel audio signal of high pass filter 33R voltage divider 34R and the power amplifier 35R former state loud speaker 2R that is provided for the high frequency that is used for L channel by being used for volume control.
And, be provided for hybrid circuit 39 from the low frequency component of the audio signal of two sound channels about add circuit 37.Be provided for hybrid circuit 39 from recipient's audio signal of partner via the hand-free call mode side terminal T of commutation circuit 23 in when conversation.Then, the output audio signal of hybrid circuit 39 is provided for subwoofer 1W by voltage divider 34W and the power amplifier 35W that is used for volume control.
Attenuation units 38L and 38R are used for carrying out the volume that reduces when hand-free is conversed from the music source of music source unit 30 according to the apparatus, acoustic reproducing with hand-free call function of present embodiment in utilization.
In the music source play mode, the attenuation of attenuation units 38L and 38R is zero.That is, attenuation units 38L and 38R in the acoustic reproduction pattern under the situation of unattenuated its audio signal its input audio signal of I/O.
When the telephone button 61 in user's push button groups 41, control unit 40 detects this switching to the hand-free call mode, and attenuation control signal is offered attenuation units 38L and 38R select circuit 32 from the source with decay audio signal.
In this case, the attenuation of attenuation units 38L during the hand-free call mode and 38R is selected so that the audio signal of music source is decayed to the degree that conversation is not disturbed.In this example, attenuation units 38L and 38R are controlled to according to the attenuation control signal from control unit 40 its input audio signal for example be decayed-20dB when the hand-free call mode.Other the configuration with the 7th embodiment in identical.
Description to the operation of the 8th embodiment
In the music source play mode, commutation circuit 21,22 with 23 each all be switched to acoustic reproduction pattern side terminal M in the mode identical with the 7th embodiment.Therefore, loud speaker 2L is not switched to microphone, and also is switched circuit 23 from the audio signal of cellular phone terminal 4 and closes.
Then, be provided for loud speaker 2L and 2R and by acoustic reproduction, and its low frequency component is provided for subwoofer 1W and by acoustic reproduction from the high fdrequency component of the left and right acoustic channels that forms from the music source of music source unit 30.This moment, the attenuation at attenuation units 38L and 38R place was zero.Change the output volume by the volume control knob in the operating operation button groups 41 65.And, wait the source that changes the binaural audio signal that sends from music source unit 30 by the CD button 62 in the operating operation button groups 41, HDD button 63, broadcasting button 64.
As user during in the music source play mode during telephone button 61 in the push button groups 41, control unit 40 switches to the hand-free call mode with top identical mode this is detected with audio signal processing unit 20.
Particularly, control unit 40 offers 51L, 52L, 51R and 52R in the mode identical with the 7th embodiment with rotation control signal, loud speaker 2L and 2R are moved to the height and position of user 3 mouth, and move among the acoustic pressure null range Zo of subwoofer 1W.
Then, in this 8th embodiment, control unit 40 switches to hand-free call mode side terminal T with commutation circuit 21 to 23.In addition, in this 8th embodiment, control unit 40 outputs to attenuation units 38L and 38R with above-mentioned attenuation control signal.Therefore, attenuation units 38L and 38R are with its input audio signal decay-20dB, and output is through the signal of decay.
Then, sender's audio signal of the user's 3 who collects at loud speaker 2L place the audio frequency of speaking is provided for cellular phone terminal 4 by amplifier of microphone 26, low pass filter 27, commutation circuit 22 and audio signal output end 28.Cellular phone terminal 4 sends to the partner by cellular phone network with sender's audio signal of the user that receives.And the recipient's audio signal from the partner that receives at cellular phone terminal 4 is imported into audio signal processing unit 20 via audio signal input end 29.
Mix with low frequency component at hybrid circuit 39 via the hand-free call mode side terminal T of commutation circuit 23 from recipient's audio signal of partner input from the audio signal that decays through attenuation units 38L and 38R of add circuit 37.Then, the audio signal from hybrid circuit 39 is provided for subwoofer 1W by voltage divider 34W and the power amplifier 35W that is used for volume control.That is, mixed with audio signal through decay from music source unit 30 from recipient's audio signal of conversation partner, and by subwoofer 1W acoustic reproduction.
Therefore, in hand-free call mode, in attenuation units 38L and 38R, be attenuated respectively-20dB, prevent from thus that call voice from becoming to hear from the audio signal of music source unit 30 according to this 8th embodiment.
Therefore, in the hand-free call mode, continuing to listen to the music source that user 3 listens in the music source play mode when, can carry out hand-free conversation with the conversation partner by cell phone 4.
Subwoofer 1W is disposed near user's head rear, and therefore, original sound emission output volume (boosting) can be less.Be disposed in the combination among the null range Zo that boosts of subwoofer 1W according to this advantage and the loud speaker 2L that will be switched to microphone, in this 8th embodiment, can when preventing to whistle and listening to music source, carry out the hand-free conversation.
The 9th embodiment (audio system in the car)
This 9th embodiment be arranged such that have between two apparatus, acoustic reproducings of hand-free call function each user can conversation each other suitably in the broadcast in music appreciating source.Following embodiment is that apparatus, acoustic reproducing with hand-free call function for example is provided for driver seat and the assistant driver seat situation as audio system in the car.
Figure 29 is the block diagram that illustrates according to the configured in one piece of audio system in the car of this 9th embodiment.As shown in figure 29, this 9th embodiment for example is that user 3B is sitting on the assistant driver seat and user 3A is sitting in situation on the driver seat.
In this 9th embodiment, can have usually and above-mentioned the 7th embodiment or the identical configuration of the 8th embodiment for the apparatus, acoustic reproducing of user 3A and 3B with hand-free call function.Therefore, in this 9th embodiment, the part identical with the above-mentioned the 7th and the 8th embodiment is denoted by the same reference numerals.For the apparatus, acoustic reproducing with hand-free call function of user 3A, the part identical with the 7th and the 8th embodiment represented with the identical label that has added suffix A.Similarly, for the apparatus, acoustic reproducing with hand-free call function of user 3B, the part identical with the 7th and the 8th embodiment represented with the identical label that has added suffix B.
According to the apparatus, acoustic reproducing of the 9th embodiment with hand-free call function and the above-mentioned the 7th and the difference of the 8th embodiment be to have carried out such layout: can between apparatus, acoustic reproducing, carry out communicating with each other with hand-free call function.
Equally, in the 9th embodiment, though do not illustrate in the drawings, the headrest that loud speaker also is set at the seat that user 3A and 3B sat partly is used as having the loud speaker of the configuration identical with configuration shown in Figure 21.
Particularly, subwoofer 1WA and 1WB are set to the central suitable part of the headrest part of the seat of being sat with user 3A and 3B.And, be used for the left-hand end that the loud speaker 2LA of high frequency of L channel and 2LB are attached to the headrest part of the seat that user 3A and 3B sat, and be used for the loud speaker 2RA of high frequency of R channel and the right-hand end that 2RB is attached to the headrest part.
Loud speaker 2LA and 2RA are disposed movably in mode same as the previously described embodiments, as mentioned above, so that between acoustic reproduction pattern and hand-free call mode, have different height and positions and direction according to loud speaker mobile member 50LA and 50RA.Similarly, loud speaker 2LB and 2RB are disposed movably, as mentioned above, so that between acoustic reproduction pattern and hand-free call mode, have different height and positions and direction according to loud speaker mobile member 50LB and 50RB.
In addition, when the hand-free call mode, loud speaker 2LA and 2RA are configured so that be positioned at the acoustic pressure null range Zo of subwoofer 1WA, and loud speaker 2LB and 2RB are configured so that be arranged in the acoustic pressure null range Zo of subwoofer 1WB.
Equally, in this 9th embodiment, subwoofer 1WA and 1WB, and loud speaker 2LA, the 2LB, 2RA and the 2RB that are used for the high frequency of left and right acoustic channels have exposed speaker configurations.
In this 9th embodiment, for the user 3A of driver seat, the loud speaker 2LA that is used for the high frequency of L channel is configured so that be switched to microphone.And for the user 3B of assistant driver seat, the loud speaker 2RB that is used for the high frequency of R channel is configured so that be switched to microphone.In Figure 29, show with echo and to be configured so that be switched to the loud speaker 2LA and the 2RB of microphone.
Therefore, when the hand-free call mode with the microphone apart arrangement on the left side of user 3A and the reason on the right of user 3B be to prevent that to the full extent each microphone from collecting the audio frequency of speaking of neighboring user.
In the present embodiment, at user 3A setting operation button groups 41A, and at user 3B setting operation button groups 41B.With user 3A and 3B the corresponding operation signal of the operation of action button group 41A and 41B is provided for control unit 40.Among control unit 40 decision operation button groups 41A and the 41B which is operated, and which button is operated, and carries out control according to its judged result thus.
At user 3A audio signal processing unit 20A is set, and audio signal processing unit 20B is set at user 3B.Cellular phone terminal 4A can be connected to audio signal processing unit 20A, and cellular phone terminal 4B can be connected to audio signal processing unit 20B.In addition, from CD Player 31C, the HDD 31H of music source unit 30 and broadcast reception unit 31B each about the audio signal of two sound channels be provided for each of audio signal processing unit 20A and 20B.
Audio signal processing unit 20A and 20B have basically with according to the above-mentioned the 7th and the identical configuration of audio signal processing unit 20 of the 8th embodiment.
Particularly, adopt such configuration: wherein, can be selected and play from the music source of music source unit 30, and can carry out telephone relation (hand-free conversation) with the external call partner by cellular phone terminal 4A and 4B and cellular phone network.Yet in this 9th embodiment, the changeable loud speaker that is used for high frequency for microphone is different between audio signal processing unit 20A and 20B, therefore, puts from this, and the configuration between audio signal processing unit 20A and the 20B also is different.
In this 9th embodiment, audio signal processing unit 20A and 20B are configured to the conversation that makes between the device and can be performed between user 3A and 3B by utilizing loud speaker 2LA (microphone), subwoofer 1WA, loud speaker 2RB (microphone) and subwoofer 1WB.If we say that the conversation that utilizes cellular phone terminal is the outside line conversation, then this conversation between the device then is the conversation (talk between the user) between interior lines.
In addition, in this 9th embodiment, the seat that user 3A and 3B are sat comprises attend a banquet transducer 43A and the 43B that take one's seat that detects user 3A and 3B respectively.The attending a banquet of transducer 43A and 43B of attending a banquet detected output and is provided for control unit 40.
Control unit 40 only will be output as the be seated user 3A of state and/or the corresponding audio signal processing unit 20A of 3B and/or 20B of expression and be made as operable state with detecting from attending a banquet of attend a banquet transducer 43A and 43B.For example, control unit 40 only offers supply voltage with detecting from attending a banquet of attend a banquet transducer 43A and 43B and is output as expression be seated user 3A and/or the corresponding audio signal processing unit 20A of 3B and/or the 20B of state, enable its operation, realize the electric energy saving thus.
Figure 30 illustrates the hardware configuration example at the apparatus, acoustic reproducing with hand-free call function of user 3A according to this 9th embodiment.And Figure 31 illustrates the hardware configuration example at the apparatus, acoustic reproducing with hand-free call function of user 3B according to this 9th embodiment.Configuration among Figure 30 and Figure 31 is the situation that is applied to this 9th embodiment according to the audio signal processing unit 20 of above-mentioned the 7th embodiment.
As shown in figure 30, in the audio signal processing unit 20A at the apparatus, acoustic reproducing with hand-free call function of user 3A, the switched terminal of commutation circuit 22A (output) is connected to the switched terminal of commutation circuit 71A.
Commutation circuit 71A is the commutation circuit that can be switched between outside line conversation and interior lines conversations (communicating with each other) by the switch-over control signal from control unit 40.
In the present embodiment, the outside line of commutation circuit 71A conversation side terminal ET (output) is connected to sender's audio input end of cellular phone terminal 4A via the sub-28A of audio signal output end.
And, be imported into audio signal processing unit 20A according to present embodiment from recipient's audio output of cellular phone terminal 4A via the sub-29A of audio signal input end from recipient's audio signal of conversation partner.Then, be provided for the outside line conversation side terminal ET (input) of commutation circuit 72A via recipient's audio signal of the sub-29A of audio signal input end input, commutation circuit 72A converse by the outside line of cellular phone terminal 4A and and the talk (interior lines conversation) of other user 3B between switch.The switched terminal of commutation circuit 72A (output) is connected to the hand-free call mode side terminal T of commutation circuit 23A.
The interior lines of commutation circuit 71A conversation side terminal IT (output) are connected to the interior lines conversation side terminal IT (input) of commutation circuit 72B of the audio signal processing unit 20B of described another user 3B in back.And the interior lines of the commutation circuit 71B of the audio signal processing unit 20B of this another user 3B conversation side terminal IT (output) are connected to the interior lines conversation side terminal IT (input) of commutation circuit 72A of the audio signal processing unit 20A of user 3A.
As shown in figure 31, in audio signal processing unit 20B, be provided with commutation circuit 21B at the loud speaker 2RB of the high frequency that is used for R channel at the apparatus, acoustic reproducing of user 3B with hand-free call function.The high fdrequency component of the audio signal of R channel is provided for the acoustic reproduction pattern side terminal M of commutation circuit 21B by power amplifier 35RB.
And loud speaker 2RB is configured to and makes be switched to microphone with the switching to commutation circuit 21B when the hand-free call mode.When the hand-free call mode, the audio signal of collecting at the loud speaker 2RB place that is switched to microphone is provided for amplifier of microphone 26B via the hand-free call mode side terminal T of commutation circuit 21B.
Then, the audio signal that is exaggerated at amplifier of microphone 26B place is provided for the hand-free call mode side terminal T (input) of the commutation circuit 22B that switches between acoustic reproduction pattern and hand-free call mode by low pass filter 27B.Acoustic reproduction pattern side terminal M (input) ground connection of commutation circuit 22B.
Then, the switched terminal of commutation circuit 22B (output) is connected to by from the switch-over control signal of control unit 40 and the switched terminal of the commutation circuit 71B that switches between outside line conversation and interior lines conversations (communicating with each other).
In the present embodiment, the outside line of commutation circuit 71B conversation side terminal ET (output) is connected to sender's audio input end of cellular phone terminal 4B via the sub-28B of audio signal output end.
And, be imported into audio signal processing unit 20B according to present embodiment from recipient's audio signal output end of cellular phone terminal 4B via the sub-29B of audio signal input end from recipient's audio signal of conversation partner.Be provided for the outside line conversation side terminal ET (input) of commutation circuit 72B via recipient's audio signal of the sub-29B of audio signal input end input, commutation circuit 72B converse by the outside line of cellular phone terminal 4B and and the talk (interior lines conversation) of another user 3A between switch.The switched terminal of commutation circuit 72B (output) is connected to the hand-free call mode side terminal T of commutation circuit 23B.
Then, the interior lines of commutation circuit 71B conversations side terminal IT (output) are connected to the interior lines conversation side terminal IT (input) of commutation circuit 72A of the audio signal processing unit 20A of another user 3A.And the interior lines of the commutation circuit 71A of the audio signal processing unit 20A of this another user 3A conversation side terminal IT (output) are connected to the interior lines conversation side terminal IT (input) of commutation circuit 72B of the audio signal processing unit 20B of user 3B.
In this 9th embodiment, for action button group 41A and 41B, as shown in figure 14, talk button 66 is added in the configuration of action button group 41 shown in Figure 9.When talk button 66 was pressed, control unit 40 had determined to produce the interior lines call request in the hand-free call mode, was used to the control operation that its interior lines conversation is performed with execution.
The operation of the 9th embodiment
To be described in the associative operation when utilizing the arbitrary action button among action button group 41A or the 41B being operated of so configuration below according to the user 3A of the system of the 9th embodiment or 3B.
Control unit 40 monitoring detect output to detect the state of taking one's seat to the seat of user 3A and 3B from attending a banquet of attend a banquet transducer 43A and 43B.Then, when detecting user 3A and take one's seat, 40 pairs of audio signal processing unit 20A power supplies of control unit are to enable its operation.Similarly, when detecting user 3B and take one's seat, 40 pairs of audio signal processing unit 20B power supplies of control unit are to enable its operation.Notice that present embodiment is the Che Nei system, therefore, much less, this system is powered when the accessory switch is opened with key.
Detect user 3A wherein and 3B takes one's seat and its operation Be Controlled unit 40 enables audio signal processing unit 20A and 20B in, except the situation that talk button 66 is pressed, carry out and above-mentioned the 7th embodiment identical operations.
Particularly, in the acoustic reproduction pattern that telephone button 61 is not pressed, for present embodiment, for example, in audio signal processing unit 20A, commutation circuit 21A and 25A are connected to music side terminal M by control unit 40.Then, in the acoustic reproduction pattern, as mentioned above, under the control of control unit 40,, and utilize three loud speakers to carry out acoustic reproduction according to the 3D system according to the selection source of pressing down to CD button 62, HDD button 63, broadcasting button 64 etc.
In the present embodiment, user 3A can select and appreciate different music source with 3B.For example, when the telephone button 61 of action button group 41A in the acoustic reproduction pattern was pressed by user 3A, control unit 40 switched to the outside line talking state in the hand-free call mode.In the present embodiment, control unit 40 switches to hand-free call mode side terminal T with commutation circuit 21A and the 25A of audio signal processing unit 20A, and commutation circuit 71A and 72A are switched to outside line conversation side terminal ET.
And as mentioned above, control unit 40 50LA of control loudspeaker travel mechanism and 50RB are so that loud speaker 2LA and 2RA are arranged in and point to the height and position and the direction of hand-free call mode.
In the outside line talking state in the hand-free call mode, as mentioned above, in audio signal processing unit 20A, be sent to the conversation partner from sender's audio frequency of the loud speaker 2LA that is switched to microphone, and send from subwoofer 1WA from recipient's audio frequency of conversation partner.Therefore, the hand-free conversation can be performed.
Next, with the associative operation of describing when talk button 66 is operated.In the present embodiment, are interior lines call request to the operation of the talk button 66 of action button group 41A, and are interior lines call request from user 3B to user 3A to the operation of the talk button 66 of action button group 41B from user 3A to user 3B.
In the situation that the interior lines call request takes place, control unit 40 judge the partner who is asked whether take one's seat with and audio signal processing unit whether be in operable state, and be in the situation of operable state not at its audio signal processing unit, control unit 40 is to its result of user notification who has asked its interior lines call request.This notice for example is used for the method that buzzer is mixed into the audio signal of music source waited by control unit 40 to be carried out.
Next, when the partner's who has been performed the interior lines call request audio signal processing unit was in operable state, control unit 40 was carried out control so that obtain to carry out the state of hand-free interior lines conversations (talk).
This control example is described as the example that will utilize user 3A to supress in the situation of talking button 66.In audio signal processing unit 20A, control unit 40 at first switches to hand-free call mode side terminal T with commutation circuit 21A and 25A, and commutation circuit 71A and 72A are switched to interior lines conversation side terminal IT.Then, in audio signal processing unit 20B, control unit 40 switches to hand-free call mode side terminal T with commutation circuit 21B to 25B, and commutation circuit 71B and 72B are switched to interior lines conversation side terminal IT.
Figure 32 illustrates audio signal processing unit 20A and the 20B that has only extracted the assembly that is used for the hand-free conversation.Figure 32 illustrates the switching state of commutation circuit 21A to 24A, 71A, 72A, 21B to 24B, 71B and the 72B in interior lines when conversation in the hand-free call mode.
According to the switching to above-mentioned commutation circuit, sender's audio signal of the user 3A that collects at the loud speaker 2LA place that is switched to microphone is provided to partner's audio signal processing unit 20B via the route of amplifier of microphone 26A → low pass filter 27A → commutation circuit 22A → commutation circuit 71A.
Then, in audio signal processing unit 20B, be provided for subwoofer 1WB from the audio signal of audio signal processing unit 20A via the route of commutation circuit 72B → commutation circuit 23B → commutation circuit 24B → be used for voltage divider 34WB → power amplifier 35WB of volume control, and by acoustic reproduction.
Like this, near the subwoofer 1WB place of sender's audio frequency user 3B of user 3A by acoustic reproduction and send.
And sender's audio signal of the user 3B that collects at the loud speaker 2RB place that is switched to microphone is provided to partner's audio signal processing unit 20A via the route of amplifier of microphone 26B → low pass filter 27B → commutation circuit 22B → commutation circuit 71B.
Then, in audio signal processing unit 20A, be provided to subwoofer 1WA from the audio signal of audio signal processing unit 20B via the route of commutation circuit 72A → commutation circuit 23A → commutation circuit 24A → be used for voltage divider 34WA → power amplifier 35WA of volume control, and by acoustic reproduction.
Like this, near the subwoofer 1WA place of sender's audio frequency user 3A of user 3B by acoustic reproduction and send.
According to top description, and talk can be performed under the hand-free state like the interior lines conversational class between user 3A and the 3B.In this case, for present embodiment, the loud speaker that is switched to microphone is disposed in the left ear side of user 3A and the right ear side of user 3B, so that they are separated by far away and user 3A and 3B are positioned between the two, therefore, prevents that to what whistle effect is better.
The tenth embodiment (audio system in the car)
The tenth embodiment is the 9th embodiment of extended pattern.The 9th embodiment is the situation that the apparatus, acoustic reproducing with hand-free call function according to the present invention is applied to driver seat and assistant driver seat.The tenth embodiment is assumed to be the four-player of car type and takes car, and wherein, the apparatus, acoustic reproducing with hand-free call function according to the present invention not only is applied to driver seat and assistant driver seat but also is applied to two seat plates of back row.
Figure 33 is the block diagram that illustrates according to the ios dhcp sample configuration IOS DHCP of audio system in the car of the tenth embodiment.In Figure 33, suppose that user 3A is sitting on the driver seat, user 3B is sitting on the assistant driver seat, and user 3C is sitting on the seat of driver seat back, and user 3D is sitting on the seat of assistant driver seat back.
Equally, in this tenth embodiment, be similar to the 9th embodiment at each the apparatus, acoustic reproducing of user 3A, 3B, 3C and 3D and can have usually and the above-mentioned the 7th and the 8th identical configuration of embodiment with hand-free call function.Therefore, equally in this tenth embodiment, the assembly identical with the above-mentioned the 7th and the assembly of the 8th embodiment is denoted by the same reference numerals.
In Figure 33, for apparatus, acoustic reproducing with hand-free call function at user 3A, 3B, 3C and 3D, the assembly identical with the above-mentioned the 7th and the assembly of the 8th embodiment with it each identical label that has been added corresponding suffix A, B, C or D represent.
Left channel loudspeaker 2LA, 2LB, 2LC and the 2LD that is used for high frequency is attached to the left side of the headrest part (not shown) of the seat that user 3A, 3B, 3C and 3D sat.And right channel loudspeaker 2RA, 2RB, 2RC and the 2RD that is used for high frequency is attached to the right side of the headrest part of the seat that user 3A, 3B, 3C and 3D sat.
Subwoofer 1WA, 1WB, 1WC and 1WD are set at the back of the head part of user 3A, 3B, 3C and 3D.Subwoofer 1WA, 1WB, 1WC and 1WD have exposed speaker configurations.
And in the present embodiment, loud speaker 2LA, the 2LB, 2LC, 2LD, 2RA, 2RB, 2RC and the 2RD that are used for the high frequency of left and right acoustic channels have exposed speaker configurations.
In the present embodiment, the loud speaker 2LA that is used for the high frequency of L channel is configured so that be switched to microphone at the user 3A of driver seat.Similarly, the loud speaker 2LC that is used for the high frequency of L channel is configured so that be switched to microphone at the user 3C of the seat of driver seat back.
And the loud speaker 2RB that is used for the high frequency of R channel is configured so that be switched to microphone at the user 3B of assistant driver seat.Similarly, the loud speaker 2RD that is used for the high frequency of R channel is configured so that be switched to microphone at the user 3D of the seat of assistant driver seat back.
Equally, for present embodiment, in the hand-free call mode, loud speaker 2RA, 2RB, 2RC and the 2RD that is used for loud speaker 2LA, 2LB, 2LC and the 2LD of high frequency and is used for high frequency is disposed in the acoustic pressure null range Zo of subwoofer 1WA, 1WB, 1WC and 1WD.
As mentioned above, loud speaker 2LA and 2RB and loud speaker 2LC and 2RD are configured so that be switched to the former of microphone because the audio frequency of speaking of the aforesaid neighboring user that prevents the collection level as far as possible and sit.Therefore, can improve the effect that prevents in conjunction with the loudspeaker arrangement position that is switched to microphone to whistling.
In the present embodiment, carried out such layout: wherein, each of the user of four seats can be appreciated music source separately, carries out conversation with external partners via cellular phone network, and carry out and four seats in one or more talk (interior lines conversation).
Therefore many ConvertBoxs 80 are set up, and as shown in figure 34, comprise above-mentioned control unit 40, and comprise respectively audio signal processing unit 20A, 20B, 20C and 20D at user 3A, 3B, 3C and 3D in the seat.In addition, many ConvertBoxs 80 comprise interior lines commutation circuit 81.
As shown in figure 34, be used for carrying out cellular phone terminal 4A, the 4B, 4C and the 4D that converse and can be connected to audio signal processing unit 20A, 20B, 20C and 20D respectively via cellular phone network and external partners.
And, each the audio frequency input/output signal (for example, among Figure 30 at the signal of the interior lines of commutation circuit 71A and 72A conversation side terminal IT place acquisition) of interior lines conversations from audio signal processing unit 20A, 20B, 20C and 20D is provided for interior lines commutation circuit 81.
Interior lines commutation circuit 81 is according to switching the interior lines talk path from the control signal of control unit 40.
As shown in figure 33, action button group 41A, 41B, 41C and 41D are provided for user 3A, 3B, 3C and the 3D in the seat respectively.Operation signal from action button group 41A, 41B, 41C and 41D is provided for the control unit 40 that is included in many ConvertBoxs 80.
Among control unit control unit 40 decision operation button groups 41A, 41B, 41C and the 41D which is operated, and judges which action button in the determined action button group is operated.Then, control unit 40 is carried out control according to its judged result.
In the present embodiment, each among action button group 41A, 41B, 41C and the 41D comprises action button as shown in figure 17.Particularly, be similar to the foregoing description, each among action button group 41A, 41B, 41C and the 41D comprises telephone button 61, CD button 62, HDD button 63, broadcasting button 64, volume control knob 65 and talk button 66.In this tenth embodiment, four the partner's designated button 671,672,673 and 674 that interrelate with talk button 66 also are provided, be used to specify the one or more conduct talk objects in other three seats.
Notice that in four partner's designated button, three partner's designated button 671,672 are set in advance so that specify another different seats at each seat with 673.Partner's designated button 674 of the remainder in four partner's designated button is to be used to specify the action button of all other three seats as the partner.
And attend a banquet transducer 43A, 43B, 43C and 43D are provided for the seat of user 3A, 3B, 3C and 3D respectively.The attending a banquet of transducer 43A, 43B, 43C and 43D of attending a banquet detected and exported the control unit 40 that is provided in many ConvertBoxs 80.Control unit 40 is carried out control, so that detect output only to the corresponding audio signal processing unit power supply of the seat of being sat with the user among audio signal processing unit 20A, 20B, 20C and the 20D, to enable its operation based on attending a banquet of attend a banquet transducer 43A, 43B, 43C and 43D.
Audio signal processing unit 20A, 20B, 20C and 20D comprise music source selected cell 32A, 32B, 32C and 32D (not shown) respectively.Therefore, the music source that they utilize action button group 41A, 41B, 41C and 41D to select can be play and appreciate to each of user 3A, 3B, 3C and 3D respectively.
Particularly, for example, when the CD button 62 among the user 3A push button groups 41A, control unit 40 detects this, and the music source selected cell 32A of control audio signal processing unit 20A selects the audio signal from two sound channels of CD Player 31C.And for example, when the HDD button 63 among the user 3B push button groups 41B, control unit 40 detects this, and the music source selected cell 32B of control audio signal processing unit 20B selects the audio signal from two sound channels of HDD 31H.This selector button operation to other user also is suitable for.
And, user 3A, 3B, 3C and 3D can by press the button 61 respectively special-purpose cellular phone terminal 4A, 4B, 4C and the 4D by being connected to audio signal processing unit 20A, 20B, 20C and 20D carry out conversation with the partner via cellular phone network.The operation of this moment is described in the 9th embodiment, therefore, omits the description to it.
In this tenth embodiment, pressing talk during button 66, after pressing one of partner's designated button 671,672 and 673, can carry out with the specified seat of partner's designated button of being pressed on partner's talk (interior lines conversation).
For example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses the partner's designated button 671 that is provided to designated user 3B.In this case, 40 pairs of control units are detected by the button push of user 3A in action button group 41A, and control interior lines commutation circuit 81 is to connect the interior lines talk paths of audio signal processing unit 20A and 20B.Like this, can between user 3A and 3B, carry out talk.
And for example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses partner's designated button 671 that is provided to designated user 3B and the partner's designated button 672 that is provided to designated user 3C.In the case, 40 pairs of control units are detected by the button push of user 3A in action button group 41A, and control interior lines commutation circuit 81 is to connect the interior lines talk path of three audio signal processing unit 20A, 20B and 20C.Like this, can between user 3A, 3B and 3C, carry out talk.
And for example, after the talk button 66 of our hypothesis in supressing action button group 41A, user 3A supresses the partner's designated button 674 that is provided to specify all other users.In the case, 40 pairs of control units are detected by the button push of user 3A in action button group 41A, and control interior lines commutation circuit 81 is to connect the interior lines talk path of all audio signal processing unit 20A, 20B, 20C and 20D.Like this, can between user 3A, 3B, 3C and 3D, carry out talk.
Note, same in this case, as mentioned above, detect output based on attending a banquet of attend a banquet transducer 43A, 43B, 43C and 43D, it is invalid to be confirmed as at the user's who does not take one's seat talk request.Then, its result is notified to the user of request talk by warning buzzer etc., as mentioned above.Yet, can carry out such layout: wherein,, under the situation that a part of seat user does not take one's seat, be enabled, and omit buzzer to existing the user that do not take one's seat to notify with the user's who has taken one's seat talk as request and a plurality of people when talking.
In above-mentioned the tenth embodiment, equally, also much less, can with the foregoing description (wherein, converse with external partners by cellular phone terminal) identical mode obtains advantage fully, and can under the situation that prevents to whistle, carry out interior lines conversations (talk).
Other embodiment
In the above-described embodiments, the audio signal former state from two sound channels about music source is provided for left and right sides loud speaker.Therefore, exist acoustic image (sound image) to be positioned near the possibility of head.Yet, making the virtual sound image localization process that stands to adopt the head transfer function from the audio signal of two sound channels about music source, the stereo sound image of two sound channels is located in towards the user (listener) as virtual sound image about can making thus.
Particularly, for example, in Fig. 7, the outlet side of circuit 32 is selected in the source on the previous stage of attenuation units 33L and 33R of being set at, virtual sound image localization process unit.Then, left and right sides loud speaker is installed towards the user in advance, and also is collected near the microphone place that is installed in two ears of user or phantom bead from the sound wave of the loud speaker of being installed, and the head transfer function is measured in advance.Then, the audio signal of the head transfer function that records of virtual sound image localization process unit by using and two sound channels is carried out process of convolution.Therefore, virtual sound image is by being located in towards user 3 from being arranged in the audio frequency that near two ears of user loud speaker 1L and 1R send backwards, thus user 3 can to listen to seem the dual-channel audio that sends from the left and right sides loud speaker of being arranged forward.
Note, according to this virtual sound image localization process unit, for example, can be many around virtual acoustic fix ranging by utilizing two loud speaker 1L and 1R to carry out 5.1 sound channels.In this case, 5.1 sound channel surround audio signals process virtual sound image localization process is with the generation dual-channel audio, and the audio signal of two sound channel is provided for loud speaker 1L and 1R respectively.Therefore, two loud speaker 1L and 1R are not limited to be used for the loud speaker of the left and right acoustic channels of stereophony audio frequency.
Notice that in above-mentioned the 7th to the tenth embodiment, one of the left and right sides loud speaker that only is used for the high frequency of subwoofer is configured so that be switched to microphone.Yet can carry out such layout: wherein, left and right sides loud speaker 2L and 2R are configured so that be switched to microphone, and one of them is suitably selected as microphone.
Next, in above-mentioned first to the 6th embodiment, shown in Figure 35 A, user's left and right sides loud speaker 1L and 1R be fixed so that the vibration plane of its vibrating diaphragm towards in front user's 3 left and right sides ear, and be in the above example, in the heeling condition of long side direction of headrest part 7 of the seat of being sat with respect to user 3.
Yet, loud speaker 1L and 1R are being installed in the situation of incline direction, the distance between loud speaker 1L and the 1R is extended, therefore, the possibility that exists driver's backsight correspondingly to worsen.
Therefore, in the situation of driver seat, shown in Figure 35 B, loud speaker 1L and 1R are attached to headrest part 7 so that on the direction that the vibration plane of the vibrating diaphragm of loud speaker 1L and 1R is located in and the long side direction of the part of resting the head on is parallel.Figure 35 B illustrates loud speaker 1L and 1R are embedded into headrest part 7 with exposed loudspeaker status state.
And, shown in Figure 35 C, by woofer 1W, be used for high frequency about the so-called 3-D system that constitutes of two little loud speaker 1Ls and 1Rs can be used as speaker configurations.In this case, for example, the other signal of the low frequency component of the audio signal of two sound channels is provided for woofer 1W about being used for.And for example, the audio signal of the left and right acoustic channels by high pass filter is offered two little loud speaker 1Ls and the 1Rs that is used for high frequency respectively.
In the situation of the example of Figure 35 C, be used for high frequency about little loud speaker 1Ls and 1Rs be arranged so that towards two ears of in front user, so that the vibration plane of its vibrating diaphragm is located in the incline direction at two ears of user.Yet loud speaker 1Ls and 1Rs that its vibrating diaphragm has little bore diameter are the little loud speakers that is used for high frequency, and be therefore, good than the backsight in the situation of Figure 35 A.
And in the above-described embodiments, the microphone that is used for the hand-free conversation only is provided for one of left and right sides loud speaker.Yet, shown in Figure 35 A, 35B and 35C, can carry out such layout, wherein, microphone 2L and 2R are provided for two loud speakers, and wherein any selected and application.
Note, in the situation of Figure 35 C, do not provide microphone, and provide microphone 2L and 2R to two that are used for high frequency little loud speaker 1Ls and 1Rs to woofer 1W.
And being provided for two the microphone 2L of left and right sides loud speaker 1L and 1R and 2R can be with the microphone that acts on the hand-free conversation.Figure 36 illustrates such layout, and wherein, left and right sides loud speaker 1L and 1R are set to the headrest part 7 of commercial seat 6, and microphone 2L and 2R also are set on the framework (acoustic pressure null range) of its loud speaker 1L and 1R.
In this case, carried out such layout: wherein, left speaker 1L and microphone 2L are used for about the conversation of the hand-free of first telephone wire, and right loud speaker 1R and microphone 2R are used for the hand-free conversation about second telephone wire.That is, be provided with two telephone wires, the hand-free conversation for a telephone wire is connected to this telephone wire with left speaker 1L and microphone 2L, and converses for the hand-free of another telephone wire, and right loud speaker 1R and microphone 2R are connected to this another telephone wire.
The operator who is sitting on the seat 6 can carry out at first line and the conversation of second-line hand-free by face being turned to the left side and the right side.In this case, can carry out at first line and second-line while hand-free conversation.Therefore, the device with the configuration among Figure 36 is suitable for the telephone answering operator's of call center hand-free conversation.In this case, the example among Figure 36 is used for telephone answering, therefore, needn't be provided for the signal processing system in playing back music source.
Advantage
According to the apparatus, acoustic reproducing with hand-free call function and the Handless unit of the foregoing description, can utilize simple hardware device when preventing to whistle, to carry out the hand-free conversation.So far, for in-vehicle apparatus etc., the trouble of existence is that the microphone that is used for the hand-free conversation must be attached to sunshading board, steering wheel etc.
On the other hand, according to the foregoing description, carried out such layout: wherein, microphone (perhaps can be used as the loud speaker of microphone) is attached to the position of the acoustic pressure null range of loud speaker, and its loud speaker is attached to the headrest part, therefore, can eliminate such trouble.
And in the Handless unit of earpiece type, the user must be with earphone, this comprise that earphone by body contact causes such as problems such as sense of discomfort, insanitarinesies.
On the other hand, in the above-described embodiments, loud speaker and microphone are fixed near the headrest the user etc., therefore, have eliminated this problem.
In addition, loud speaker is disposed near the user's ear, can reduce acoustic energy thus, even and in the narrower space such as vehicle etc., can when suppressing, carry out and suppress the hand-free conversation of whistling other people influence.
And in the foregoing description of the apparatus, acoustic reproducing with hand-free call function, each user can select music source separately, and can control volume separately.Music source is attenuated when hand-free is conversed, and can carry out the hand-free conversation thus when listening to music source.
And for the 9th embodiment, have such advantage: the microphone that is used for the hand-free conversation can also be used for audio identification when music playing mode.
And have such advantage: the microphone that is used for the hand-free conversation can also be used to collect external noise to carry out noise removing when music playing mode.
Other modifications
In the above-described embodiments, when the hand-free call mode, when listening to music source, carry out the hand-free conversation.Yet, in the hand-free call mode, can carry out control so that will not offer loud speaker 1L and 1R from the audio signal of two sound channels of music source unit.Particularly, when the hand-free call mode, from the output level of the audio signal of music source unit 30 can be attenuated and be zero (attenuation for-∞), its generation can be stopped, perhaps the audio signal from music source unit 30 can be weakened.
In above-mentioned the 7th to the tenth embodiment, about the loud speaker that is used for high frequency of two sound channels have exposed speaker configurations, still, these loud speakers may be attached to reflecting plate, perhaps can be the loud speakers that is accommodated in the loudspeaker enclosure.Yet, about at least one of the loud speaker that is used for high frequency of two sound channels must have the configuration that is switched to microphone.
And in the above-described embodiments, sender's audio frequency of hand-free conversation is sent out by amplifier of microphone and low pass filter, and recipient's audio frequency is through power amplifier.Yet, depend on the type of cellular phone terminal, perhaps, can omit amplifier of microphone, low pass filter and power amplifier at the method for attachment of its cellular phone terminal.
In the above-described embodiments, carried out carrying out layout with the conversation of external partners, yet this telephone network is not limited to cellular phone network by cellular phone network, and much less, can carry out conversation by subscriber call spider lines or other telephone network.‘
And the apparatus, acoustic reproducing with hand-free call function is not limited to the situation of audio system in the above-mentioned car, but for example can be configured to apparatus for household use.
Note in the above-described embodiments, illustrate the action button group that connects by cable, yet much less, the action button group can having the configuration that is set in the remote controller.
The application comprises Japanese priority patent application JP 2008-207918 that submits to the Japan special permission Room with on August 12nd, 2008 and the relevant theme of submitting to the Japan special permission Room on August 27th, 2008 of the disclosed theme of Japanese priority patent application 2008-217884, and the full content of these two applications is incorporated into this by reference.
Those skilled in the art should be understood that and can carry out various modifications, combination, sub-portfolio and change according to designing requirement and other factors, as long as they are within the scope of claims or its equivalent.

Claims (20)

1. Handless unit comprises:
Loud speaker, described loud speaker is clamped near the user's ear by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate, so that mix the sound that sends from its vibrating diaphragm front and back;
Microphone, described microphone is set at the mixed and zone that is cancelled of the sound that sends from the front and back of the described vibrating diaphragm of described loud speaker, and be configured to collect described user's call voice, wherein, described zone is the acoustic pressure null range, and described microphone also is configured to collect the sound wave that sends from described loud speaker and confirms described acoustic pressure null range when reproducing audio frequency at described loud speaker place;
Output device, described output device are configured to export call voice signal from the described user of described microphone to send it to the conversation partner; And
Input unit, described input unit are configured to receive call voice signal from described conversation partner to provide it to described loud speaker.
2. Handless unit according to claim 1, wherein, the described user's who is collected by described microphone call voice signal is through the frequency band limits of low pass filter, and is output from described output device subsequently.
3. Handless unit according to claim 1, wherein, described loud speaker is attached on the headrest as near the seat that described user sat of the position the described user's ear;
And wherein, described microphone is attached to the position of the mouth that closes on described user, and this position is the described zone that is cancelled.
4. Handless unit according to claim 1, wherein, the predetermined audio signal of described call voice is provided for described loud speaker with the process acoustic reproduction, and be provided in the situation of described loud speaker with described call voice at described predetermined audio signal, described predetermined audio signal is attenuated, and synthetic with described call voice subsequently.
5. Handless unit according to claim 1, described output device comprises
First lead-out terminal is configured to the call voice signal from the described user of described microphone is sent to the conversation partner by telephone wire,
Second lead-out terminal is configured to the call voice signal from the described user of described microphone is sent to described input unit according to another communicator of claim 1, and
First selects circuit, is configured to select described first lead-out terminal or described second lead-out terminal;
Described input unit comprises
First input end is configured to receive the call voice signal that sends from the conversation partner by telephone wire,
Second input terminal is configured to receive the call voice signal that sends from the conversation partner by second lead-out terminal according to another communicator of claim 1, and
Second selects circuit, is configured to select described first input end or described second input terminal;
And described Handless unit comprises
It is during with described another communicator conversation that control device, described control device are configured to the selection instruction that makes as the user, and described first selects circuit to select the described second lead-out terminal side, and the described second selection circuit is selected the described second input terminal side.
6. Handless unit according to claim 1 also comprises:
Be configured to also noise reduction audio signal be offered except the call voice signal from described conversation partner the device of described loud speaker, described noise reduction audio signal is to pass through anti-phase acquisition by making by the audio signal of described microphone collection and acquisition.
7. Handless unit according to claim 1, wherein, loudspeaker unit is used to replace described microphone.
8. apparatus, acoustic reproducing with hand-free call function comprises:
Loud speaker, described loud speaker is clamped near the user's ear by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate, so that mix the sound that sends from its vibrating diaphragm front and back;
The audio signal generating apparatus is configured to generate and will be provided for described loud speaker to stand the audio signal of acoustic reproduction;
Microphone, described microphone is set at the mixed and zone that is cancelled of the sound that sends from the front and back of the described vibrating diaphragm of described loud speaker, and be configured to collect described user's call voice, wherein, described zone is the acoustic pressure null range, and described microphone also is configured to collect the sound wave that sends from described loud speaker and confirms described acoustic pressure null range when reproducing audio frequency at described loud speaker place;
Output device is configured to export call voice signal from the described user of described microphone to send it to the conversation partner;
First commutation circuit, described first commutation circuit is set between described output device and the described microphone, and is configured to form the path of call voice signal from described microphone to described output device of described user when conversing;
Input unit, described input unit are configured to receive call voice signal from described conversation partner to provide it to described loud speaker;
Second commutation circuit, described second commutation circuit is set between described input unit and the described loud speaker, and is configured to form the path of call voice signal from described input unit to described loud speaker of described conversation partner when conversing;
Attenuating device is configured to decay from the audio signal of described audio signal generating apparatus when conversation; And
Adding device, described adding device are set between described second commutation circuit and the described loud speaker, and are configured to audio signal and described call voice signal plus from described attenuating device.
9. the apparatus, acoustic reproducing with hand-free call function according to claim 8, wherein, the attenuation of described attenuating device that described audio signal is provided for a side of described adding device is set to larger than the attenuation of opposite side.
10. the apparatus, acoustic reproducing with hand-free call function according to claim 8 also comprises:
Be configured to except also noise reduction audio signal is offered the device of described loud speaker from the audio signal of described audio signal generating apparatus, described noise reduction audio signal is to pass through anti-phase acquisition by making by the audio signal of described microphone collection and acquisition.
11. the apparatus, acoustic reproducing with hand-free call function according to claim 8 also comprises:
Speech recognition equipment is configured to discern the described audio signal by described microphone collection and acquisition as audio frequency; And
Control device is configured to generate control signal according to the audio identification result of described speech recognition equipment.
12. a hand-free call method may further comprise the steps:
The mixed and zone that is cancelled of the sound that microphone arrangement is sent near the front and back of the vibrating diaphragm of the loud speaker from be clamped in user's ear by clamping device, described microphone is configured to collect described user's call voice, and the loudspeaker unit that has is not attached on the reflecting plate so that mix the sound that sends from the front and back of described vibrating diaphragm, wherein, described zone is the acoustic pressure null range, and described microphone also is configured to collect the sound wave that sends from described loud speaker and confirms described acoustic pressure null range when reproducing audio frequency at described loudspeaker unit place;
With described loudspeaker arrangement near described user's ear, and with described microphone arrangement near described user's mouth;
To send to the conversation partner from the described user's of described microphone call voice signal; And
Receive the call voice signal to provide it to the described loud speaker that is used for audio emission from described conversation partner.
13. the apparatus, acoustic reproducing with hand-free call function comprises:
First loud speaker, described first loud speaker is held by clamping device, and the loudspeaker unit that has is not attached on the reflecting plate, so that mix the sound that sends from its vibrating diaphragm front and back;
Second loud speaker, described second loud speaker are set at the mixed and zone that is cancelled of the sound that sends from the front and back of the described vibrating diaphragm of described first loud speaker, and are configured so that be switched to microphone;
Commutation circuit, described commutation circuit is arranged to described second loud speaker is switched to microphone, be sent to described hand-free conversation partner's state with the call voice signal that switches to the described user who collects at described microphone place when the hand-free call mode, and the described audio signal that switches to reproduction when the acoustic reproduction pattern is provided for the state of described second loud speaker;
The audio mix device is configured to when described hand-free call mode, offers described first loud speaker with having mixed the audio signal that will reproduce with audio signal from conversation partner's audio signal;
Output device is configured to when described hand-free call mode, and described user's call voice signal is sent to the conversation partner; And
Input unit is configured to when described hand-free call mode, receives call voice signal from described conversation partner to provide it to described first loud speaker.
14. the apparatus, acoustic reproducing with hand-free call function according to claim 13, wherein, described first loud speaker is attached on the headrest of the seat that the user sits;
And wherein, described second loud speaker is attached on the described seat in the described zone that will be cancelled.
15. the apparatus, acoustic reproducing with hand-free call function according to claim 13 also comprises:
Travel mechanism, be configured in described acoustic reproduction pattern described second loudspeaker arrangement near described user's ear, and in described hand-free call mode, described second loudspeaker arrangement is being arranged in the zone that will be cancelled described user's mouth near.
16. the apparatus, acoustic reproducing with hand-free call function according to claim 13 also comprises:
Second travel mechanism only is configured to when described hand-free call mode described second loud speaker to be moved to the described zone that will be cancelled.
17. the apparatus, acoustic reproducing with hand-free call function according to claim 13, wherein, described first loud speaker is the loud speaker that is used for the low pitch audio reproduction, and described second loud speaker is to be used for the loud speaker that higher pitch sounds is reproduced.
18. the apparatus, acoustic reproducing with hand-free call function according to claim 17, wherein, the number that is used for the loud speaker of higher pitch sounds reproduction is 2, and described second loud speaker is one in described two loud speakers.
19. a hand-free call method may further comprise the steps:
Second loudspeaker arrangement is mixed at the sound that sends from the front and back of the vibrating diaphragm of first loud speaker and the zone that is cancelled, wherein said second loud speaker is configured so that be switched to microphone, and described first loud speaker is not attached on the reflecting plate so that mix the sound that sends from the front and back of described vibrating diaphragm by clamping device clamping and the loudspeaker unit that had;
When the acoustic reproduction pattern, the audio signal that will reproduce offers described first loud speaker, and the described audio signal that will reproduce is offered described second loud speaker; And
When the hand-free call mode, described second loud speaker is switched to microphone send to hand-free conversation partner with the described user's that will collect call voice signal at described microphone place, and will be by offering described first loud speaker with the audio signal that the described audio signal addition that will reproduce obtains from described conversation partner's audio signal.
20. hand-free call method according to claim 19 is further comprising the steps of:
When described hand-free call mode, the described audio signal that will reproduce that decays be added to the audio signal through decay on described conversation partner's the audio signal then.
CN 200910166410 2008-08-12 2009-08-12 Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method Expired - Fee Related CN101651732B (en)

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