JP2001286000A - Acoustic device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of not capable of forming an optimum sound field to plural positions even through the optimum sound field is formed inside a vehicle by appropriately setting the volume and output delay time, etc., of plural speakers arranged around the vehicle and the problem of deterioration of the sound field of other positions when one rear speaker is muted by a rear enter system or the like. SOLUTION: A sound matching speaker set(SMS) 13 composed of four speakers in four directions in the figure is arranged at a ceiling part or the like at a vehicle center, independent filters for which a volume ratio and a sound output timing are adjusted are connected respectively to the individuals of total eight pieces of the speakers including surrounding four speakers and output is performed. Thus, the optimum sound field to four seats inside the vehicle is formed. Also, the filters of the respective speakers are preset matches with the form of the mute of the surrounding speakers, the filter is selected at the time of detecting the mute and the sound field of the other position is not changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can form an optimum sound field at a plurality of positions when a predetermined sound field is formed by using a plurality of loudspeakers unique to a vehicle. The present invention relates to a vehicular acoustic device in which when a sound of a speaker is muted, a sound field at another position is not changed by a sound field correcting speaker set including a plurality of speakers.

[0002]

2. Description of the Related Art In an audio system for a vehicle, for example, in the vehicle shown in FIG. 6, two speakers of FL and FR are provided at a front portion as speakers unique to the vehicle, and two speakers of RL and RR are provided at a rear portion. A total of 4
An audio device equipped with three speakers and a woofer in the center of the rear as needed, usually operate all of these speakers, as a whole, as well as any volume such as the driver's seat and the center of the vehicle. Is set so that the left and right volume balances with respect to the location can be obtained. In order to obtain a better sound effect, the delay time of the sound output from each speaker may be adjusted in advance according to the characteristics of each vehicle. Further, there is a device in which the delay time of the sound volume and the sound output is arbitrarily adjusted so as to be able to match the user's preference.

[0003] Recent advances in audio technology for vehicles and the trend toward higher-grade vehicles have demanded more audio devices for vehicles and more precise sound control. Or, it is often set to form the most appropriate sound field for both passengers in the front seats, whereas in luxury cars including limousine type, on the contrary, it is most suitable for passengers in the rear seats It is necessary to set in accordance with various cases, such as setting to form a proper sound field.

Further, in the audio device for a luxury vehicle as described above, in the rear seat, depending on the number of persons sitting there, or even if one person sits, the person sits on the right seat or left side depending on the position of the person. It is necessary to set the sound field so as to form an appropriate sound field when the user sits on both seats, and also when the user sits on both seats. The same applies to a person sitting in the front passenger seat, and a suitable sound field needs to be similarly formed for the driver. As described above, in recent vehicle audio devices, it is not only necessary that a person in each seat in the vehicle can simply listen to the audio, but also that a better audio environment balanced for the passengers in each seat is required. It is supposed to be.

In recent years, a rear seat audio operation unit has been provided which can select various audio sources especially for a rear seat person. A rear enter system that can arbitrarily perform selection of various audio sources such as a radio, adjustment of a volume of a user's seat, and the like has been adopted.

In this rear enter system, for example, as shown in FIG. 7, a head unit 51 for comprehensively controlling an audio device installed in a console box or the like is centered, and a control signal bus line 52 connected thereto is connected.
In contrast, a rear enter system in which a rear left seat operation unit 53 and a rear right seat operation unit 54 in the rear seat audio operation unit 50 are connected to each other so that audio equipment can be operated at the rear seat. Is composed. In the illustrated example, the control signal bus line 52 is further connected to the CD changer unit 5.
5. Other units 56 as various audio media such as an MD changer, television and video are connected.

The head unit 51 has a total of four FL speakers 5 installed on the vehicle as described above.
7, FR speaker 58, RL speaker 59, and RR speaker 60 are connected to each other, and depending on the acoustic characteristics of each speaker, the place where the speakers are installed, and the directivity, an optimal sound field for the entire vehicle interior or a predetermined position. The head unit 51 is controlled so as to form a space, and the on / off and volume control of individual speakers can be controlled as needed by the rear seat audio operation unit 50 as well. Further, in the rear seat audio operation unit 50, an audio device in the vehicle compartment can be selected from an arbitrary audio medium such as a CD, a radio, and an MD according to a preference of a person in the rear seat.

Various types of rear seat audio operation units 50 for use in a rear enter system have been proposed. For example, in the panel shown in FIG. 8, a headphone jack 62 for a rear left seat and a headphone jack 62 for a rear right seat are provided on a panel 61. A headphone jack 63 is provided, and the passenger of each seat inserts the connection pin of the headphones here,
Apart from the main audio system in the cabin, for example, audio select button 64, video select button 65
By operating the media switching button such as
Any audio source or video source can be selected and used. The rear seat audio operation unit 50 for the rear enter system is installed, for example, in the armrest portion at the center of the rear seat in the vehicle shown in FIG. The television or video display is installed at an arbitrary position in front of the rear seat, that is, on the surface behind the front seat.

In this system, by operating the audio output on / off and volume control buttons 66 and 67, the audio output from the speaker installed at the rear of the seat is turned off and the speaker is muted. You can also adjust the volume. Further, by operating the operation key 70 while watching the operation display on the display unit 68, the selection button 71
By operating, any song, broadcast station, etc. can be selected. Therefore, for example, when the sound of the speaker installed at the back of the seat or the like is disturbed by the person in the right seat, the volume can be adjusted to an arbitrary volume by operating the right speaker volume adjustment button 67. When headphones are inserted into the headphone jack 63 for the seat, it is possible to automatically mute the speaker behind the seat.

Similarly, when the sound of the rear speaker is disturbed by the person in the left seat, the audio output on / off and volume control button 66 of the left speaker is operated,
It can be adjusted to any volume or muted. The rear seat audio operation unit 50 further includes a microphone connection jack as needed, and a voice recognition operation button, so that a person sitting on the rear seat can operate audio equipment and the like by voice. Can also.

[0011]

The sound output from each speaker in the conventional vehicular audio apparatus is, as described above, particularly in a vehicle equipped with an audio system for forming an optimum sound field, as described above. The sound field is set so as to form the most appropriate sound field at a predetermined position that seems to be most appropriate, for example, at the center of the driver's seat, the center of the front seat, or the center of the rear seat. Therefore, if the optimal sound field is formed in the driver's seat, it will not be optimal for the passenger seat, and if the center of the front seat is the optimal sound field, both the driver's seat and the passenger's seat will not necessarily be Not the best one.

Further, when a VIP sits on a rear seat like a luxury car, it is set so that an optimum sound field is formed on the rear seat side. Even in such a case, the VIP is set on the right seat side of the rear seat. Or left-side seating,
Moreover, depending on whether one VIP sits on the right side or on the left side, there are cases where the VIP sits in a preset optimal sound field and cases where it does not. Therefore, there has been a demand for a vehicle acoustic device that can obtain an optimal sound field in all seats.

On the other hand, an audio system for a vehicle using the above-mentioned rear enter system operates by adjusting the volume of four front, rear, left and right speakers so that a predetermined sound field space is completed in the whole vehicle. When, for example, the passenger in the rear right seat wants to rest quietly as described above, and
May be used to turn off the RR speaker 60 at the rear of the rear right seat, or when a headphone is connected to the headphone jack 63 and another audio source is selected and listened to, the controller automatically turns the RR speaker 60 near the right rear seat. A certain RR speaker may be muted.

In such a case, in an audio apparatus which is set to operate by the balance of the four speakers so that an almost optimal sound field space is completed in the entire vehicle, for example, as in the above-described example, R on the right
The R speaker 60 is muted, and only one speaker on the front side is used as the right speaker, and the speaker is operated by three speakers as a whole, so that the sound field space is completely different from the initial sound field space. This is a very bad sound field for passengers. At this time,
Front-side FR speaker 58 operating one on the right side
Even if the volume of the RR speaker 60 is increased, it is not possible to cover all of the muted RR speaker 60 due to the speaker arrangement.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a vehicular acoustic apparatus capable of forming an optimal sound field at a plurality of positions in a vehicle, and to balance a plurality of speakers unique to the vehicle. It is an object of the present invention to provide a vehicular acoustic device in which a sound field of another part is not changed as much as possible even when the output of a specific speaker is stopped in an audio device that is operated. I do.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sound field correction system including a plurality of speakers unique to a vehicle and a plurality of speakers installed at substantially the center of the vehicle and having different directions. Speaker set, and a sound field correction filter that performs sound field correction independently of each of the speakers of the vehicle and each of the speakers of the sound field correction speaker set. A sound apparatus for a vehicle, wherein sound fields at a plurality of places of the vehicle are arbitrarily set by a field correction filter.

In another aspect, a memory for storing a plurality of sound field correction filter data, a mute detection unit for detecting a mute operation of each speaker unique to the vehicle, and a mute speaker are provided. A sound field correction filter for each remaining loudspeaker, which is set in advance and read out from the memory, and outputs the data to the corresponding sound field correction filter of each loudspeaker. It is what it was.

In another aspect, the sound field correction filter data is a vehicular acoustic device which is data of a volume ratio of each speaker.

In another aspect, the sound field correction filter data is a vehicle acoustic device that is data of a ratio of delay times output from respective speakers.

[0020] In another aspect, the vehicle is an audio device for a vehicle further comprising a rear seat operation unit for independently operating an audio operation in a rear seat.

[0021]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view of the interior of a vehicle to which the vehicle acoustic device of the present invention is applied. In this vehicle, similarly to the conventional vehicle, an FL speaker 2 near the front left seat 1 and a FL speaker 2 near the front right seat 3. FR speaker 4, RL speaker 6 behind rear left seat 5, R behind rear right seat 7
An R speaker 8 is installed, and an RL speaker 6
The woofer 9 is provided at an intermediate position between the loudspeaker 8 and the RR speaker 8.
The volume, output timing, sound quality, and the like of these speakers are individually controlled by the head unit 11 in the same manner as in the conventional speaker. Various audio sources 28 are connected to the head unit 11 in the same manner as the conventional one, and a mute-compatible filter memory 22 for each speaker is provided inside the head unit 11 as described later.

Similarly to the above-mentioned conventional one, an audio operation unit 12 for a rear seat is provided in an armrest portion in the middle of the rear seat, and a signal of the audio operation unit 12 is transmitted to a head unit 11.
And a rear enter system that can freely control the audio device at the rear seat in the same manner as that shown in FIGS. As a result, for example, since the person in the rear right seat 7 is quietly resting, the mute button of the rear seat operation unit 12 is operated so as to mute the RR speaker 8 outputting sound at least immediately behind. The audio output of the RR speaker 8 can be muted in conjunction with inserting a headphone pin into a headphone jack of the rear seat audio operation unit 12 to listen to another audio source.

Further, a sound matching speaker set 13 is provided in the middle of the vehicle, and is installed, for example, on the ceiling in the center of the vehicle compartment. The sound matching speaker set 13 has a sound matching speaker (SMS) (hereinafter, referred to as "FL-SMS speaker") 14 facing the left front side (FL) and a right front side. (FR) sound matching speaker (hereinafter referred to as "FR-SMS speaker") 15 and sound matching speaker (hereinafter referred to as "RL-SMS speaker") 1 facing the rear left side.
6 and a sound matching speaker (hereinafter referred to as “RR-SMS speaker”) 17 facing the rear right side.

These sound matching speakers, like the speakers arranged at the four corners of the vehicle, are individually controlled by the head unit 11 for their volume, output timing,
Also, the sound quality and the like can be changed as needed. Also,
For example, as described above, when the person in the rear right seat 7 performs an operation to mute the RR speaker 8 by the rear seat audio operation unit 12, the muted RR
Control is performed to change the volume, output timing, and the like of the other speakers so as to supplement the output of the speaker 8. As described above, for example, when the person in the rear right seat 7 performs an operation to mute the RR speaker 8, the RR-SMS speaker 17 of the sound matching speaker set 13 facing the rear right seat is interlocked. Mute to avoid extra audio output to the person in the rear right seat.

The control of the loudspeaker as described above can be operated, for example, by a system including the functional blocks shown in FIG. That is, the head unit 11 to which the various audio source units 28 are connected can individually output all of the respective speakers, and in particular, the rear enter system for the rear left seat earphone in the rear seat audio operation unit 12 by the rear enter system. Jack EJ1
When the pin of the headphone 23 is connected to the headphone, the headphone connection detection unit 25 detects this, and the mute execution unit 26 turns off the mute switch S3 of the RL speaker 6 behind the rear left seat so that the mute can be performed. I have to. At the same time, surround matching speaker set 1
The mute switch S7 of the RL-SMS speaker 16 at 3 is also turned off to mute, so that no sound is output to the person in the rear left seat.

Similarly, an earphone jack E for the rear right seat
When a headphone 24 is connected to J2, this is detected by a headphone connection detection unit 25, and a mute execution unit 26 sets a mute switch S4 of the RR speaker 8 behind the rear right seat.
To mute by turning off the RR-S in the surround matching speaker set 13 in the same manner as described above.
The mute switch S8 of the MS speaker 17 is also turned off to mute, so that no sound is output to the person in the rear right seat.

Further, the user mute selection execution section 20
The operation of the mute operation unit of each seat is detected by a mute operation detection unit 1
9 and performs a mute operation on the speaker corresponding to the detected seat. Therefore, when a person in the front left seat performs a mute operation, the mute switch S1 is turned off to turn off the FL speaker 2, and the FL-
The mute switch S5 of the SMS speaker 14 is turned off to perform a mute operation. Similarly, when the person in the front right seat performs the mute operation, the mute switches S2 and S6 are turned off to perform the mute operation. Further, when the person in the rear left seat and the person in the rear right seat mute, the mute switches S3 and S7 and the set of the mute switches S4 and S8 are turned off and the mute operation is performed in the same manner as when the headphones are connected. I do.

On the other hand, in accordance with the various mute operation modes as described above, the filter selection section 21 selects a filter group using, for example, a mute mode and filter group selection correspondence table as shown in FIG. That is, there are four types of muted speakers when there is only one speaker, two types when two speakers are muted, and four types when all three speakers are muted.
There are corresponding types of filter groups. As shown in the filter selection table of FIG. 4A, for example, each filter group includes predetermined filters 1-1 to 14-8 corresponding to the respective operation speakers.

Each of the filters 1-1 to 14-8 sets a volume ratio and a delay ratio in the example shown in FIG. 4B, for example, when only the speaker RR is muted. 3 and the filter group No. selected based on the filter group selection correspondence table. 4, the F1 filter selected by, for example, the FL speaker in the filter selection table of FIG. 4A is the filter 1-1, and the characteristics of the filter 1-1 are the filter characteristics table of FIG. Thus, the volume ratio is set to 1.1 times when the state before muting is set to 1, and the output delay ratio in consideration of the sound transmission delay is set to 0.8 times in advance. Such settings are determined in advance by experiments for each vehicle, and the results are used to determine the volume and output delay time shared by each speaker, and these values are all stored in the filter memory 22 shown in FIGS. To memorize it. In addition, as a result of the audio output ratio being set arbitrarily in each filter, it is possible to output an audio equivalent to the volume before muting by adjusting the volume of the entire interior of the vehicle in the audio device.

Thus, in response to the signal from the user mute selection execution section 20 of FIG. 2, the filter selection section 21 makes the corresponding filter 1-1 stored in the filter memory 22.
1 to 14-8 are selected and output to filters F1 to F8 for adjusting the audio signals of the corresponding speakers. In addition,
When the woofer 9 is used in the audio device of this vehicle, a similar filter is set for the woofer 9.
Further, in addition to the above-described volume ratio and output delay ratio, various audio characteristics such as sound quality can be set in advance as necessary as the characteristics of the filter.

As a result of performing the above operation, for example, FIG.
As shown in (a), when the person in the rear right seat 7 mutes the RR speaker 8, the change in the sound field in the other seat portion due to the muting is reflected by the FL-SMS speaker 14 in the surround matching speaker set 13. , FR-S
By selecting a predetermined filter for the MS speaker 15 and the RL-SMS speaker 16, the sound volume and the output delay time are supplemented, and the sound volume and the output delay time of the FL speaker 2, the FR speaker 4, and the RL speaker are similarly changed. A person in another seat can adjust the RR speaker 8 to such an extent that the RR speaker 8 is not muted.

When the person in the rear left seat mutes the RL speaker 6, as shown in FIG. 5B, the RL speaker 6 is supplemented with another speaker in the same manner as described above, and the RL speaker 6 is made available to the person in another seat. You can adjust it as much as you want. Furthermore, if the person in the front left seat is muted,
As a result of the same operation in the various mute modes shown in FIG. 3, it is possible to prevent a large change in the sound field from being given to a person whose seat is not muted in all the modes.

Further, in the above-described embodiment, the muting of each speaker unique to the vehicle is detected to select and use a filter most suitable for other speakers. Except when mute,
When the volume of the speakers, that is, the volume is adjusted, the volume adjustment amount may be detected, and a filter corresponding to each of the remaining speakers may be appropriately selected.

[0034]

The present invention is configured as described above.
An optimal sound field can be formed at each of a plurality of positions in the vehicle, and all persons sitting in the vehicle can individually listen to audio in the optimal sound field,
Even if a person sits on the right side or the left side in the rear seat, the audio can be heard in the same optimal sound field.

Further, a memory storing a plurality of sound field correction filter data, a mute detecting section for detecting a mute operation of each speaker unique to the vehicle, and a mute set in advance corresponding to the mute speaker A filter selection unit for reading out the sound field correction filter data for each of the remaining speakers from the memory and outputting the data to the sound field correction filter of each corresponding speaker. In the audio device operating in a balanced manner, even when the output of a specific speaker is stopped, it is possible to prevent the sound field of other parts from being changed.

Further, when the sound field correction filter data is data of the ratio of the volume of each speaker, a predetermined balanced volume is obtained from the speakers in each direction at each position in the vehicle. As described above, even when a specific speaker is muted, it is possible to prevent a change in the volume balance from the speaker in each direction at each position.

Further, when the sound field correction filter data is data of a ratio of delay time output from each speaker, the sound output from the speaker in each direction at each position in the vehicle. The timing can form the optimal sound field space, and even when the specific speaker is muted as described above, the output timing of the sound from the speaker in each direction with respect to each position is optimized. Thus, an optimal sound field space can always be formed.

Further, the vehicle further comprises a rear seat operation unit for independently operating an audio operation at a rear seat,
In the configuration of the rear enter system, even when the person in the rear seat freely operates the speaker volume, mute, etc., it is possible to prevent the sound field from being changed for the person in another seat. .

[Brief description of the drawings]

FIG. 1 is a plan view mainly showing a speaker configuration in a vehicle equipped with a vehicle acoustic device of the present invention.

FIG. 2 is a functional block diagram showing the interrelationship of functions according to the embodiment of the present invention.

FIG. 3 is a table showing a correspondence between a mute mode and a filter group used for selecting a filter according to the present invention.

FIG. 4 is a table showing an example of a filter selection table and a characteristic table of each filter used for selecting a filter according to the present invention.

FIG. 5 is a plan view showing the operation of the remaining speakers when a part of the speakers in the rear seat are muted in the present invention, and FIG.
(B) shows the operation when the RL speaker is muted.

FIG. 6 is a plan view of a vehicle provided with a conventional rear enter system.

FIG. 7 shows various units of a conventional rear enter system,
FIG. 3 is a block diagram showing a connection mode of a speaker and a speaker.

FIG. 8 is a plan view showing an example of a rear audio operation unit used in a conventional rear enter system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front left seat 2 FL speaker 3 front right seat 4 FR speaker 5 rear left seat 6 RL speaker 7 rear right seat 8 RR speaker 9 woofer 11 head unit 12 rear seat operation unit 13 sound matching speaker set 14 FL-SMS speaker 15 FR -SMS speaker 16 RL-SMS speaker 17 RR-SMS speaker

Claims (5)

[Claims] 1. A plurality of speakers unique to a vehicle, a speaker set for sound field correction provided at a substantially center of the vehicle and provided with a plurality of speakers each having a different direction, each speaker unique to the vehicle, and sound. A sound field correction filter that performs sound field correction independently on each of the speakers of the field correction speaker set, and arbitrarily sets sound fields at a plurality of locations of the vehicle using the sound field correction filters independent of the speakers. A sound device for a vehicle, wherein the sound device is set. 2. A memory storing a plurality of sound field correction filter data, a mute detection unit for detecting a mute operation of each speaker unique to the vehicle, and a mute set in advance corresponding to the mute speaker 2. The vehicle according to claim 1, further comprising: a filter selecting unit that reads out the sound field correction filter data for each of the remaining loudspeakers from the memory and outputs the data to the corresponding sound field correction filter of each loudspeaker. For sound equipment. 3. The acoustic device for a vehicle according to claim 1, wherein the sound field correction filter data is data of a ratio of a volume of each speaker. 4. The vehicular sound according to claim 1, wherein the sound field correction filter data is data of a ratio of delay times output from respective speakers. apparatus. 5. The acoustic device for a vehicle according to claim 1, wherein the vehicle is provided with a rear seat operation unit that performs audio operation independently on a rear seat. .