JP2001268684A - Handset - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handset which is usable for various purposes. SOLUTION: The handset extracts a circumferential sound as a transmitter signal and outputs it to a phase inverter and a changeover switch. Further, the sound extracted by the transmitter is supplied to a transmitter receiver. The transmitter signal inputted to the phase converter is inverted in phase there and outputted to the changeover switch. Then one of the transmitter signal from the transmitter (phase uninverted) and the transmitter signal having its phase inverted by the phase converter is outputted to a composing unit through the changeover switch according to its setting state. A receive signal is outputted from the transmitter receiver to the composing unit. The transmitter signal and receive signal inputted to the composing unit are put together and supplied as a composite signal to the receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology such as an earphone or a headphone with a noise reduction function used for a portable sound reproducing apparatus or the like.

[0002]

2. Description of the Related Art Conventionally, a portable sound reproducing device (a device for reproducing sound recorded on a cassette tape, CD, MD).
Earphones or headphones with a noise reduction function are known as earphones or headphones used for such purposes.

For example, a microphone is installed inside a headphone, and the microphone collects noise around the user's ear, inverts the phase, and outputs the inverted sound to the headphone. As a result, the ambient noise directly transmitted to the ear is acoustically canceled by the sound output from the headphones (the sound obtained by inverting the phase of the noise around the user's ear).

[0004]

However, since such earphones or headphones are used in portable sound reproducing devices for the purpose of making music easier to hear under noise, they are merely unidirectional information transmitting means. And cannot be used for any other purpose.

The present invention has been made in view of the above points, and an object of the present invention is to provide a handset which can be used for various purposes.

[0006]

According to one aspect of the present invention, there is provided a handset attached to a transceiver, wherein the handset is attached to a user's ear, and the handset is connected to a handset. A transmitter for extracting a surrounding sound as a transmitter signal, a phase inverter for inverting the phase of the transmitter signal extracted from the transmitter, and extracting from the transmitter. A switch that can switch and output any of the transmitted transmitter signal and the transmitter signal whose phase has been inverted by the phase inverter, a reception signal output from the transceiver, and the switch. And a synthesizer that combines the transmitter signal output from the transmitter and outputs the synthesized signal as a synthesized signal, and supplies the transmitter signal extracted from the transmitter as the transmitted signal to the transceiver. Out of the synthesizer A synthesized signal that is configured to provide to the handset.

[0007] According to the invention configured as described above, the surrounding sound is extracted by the transmitter as a transmitter signal and output to the phase inverter and the changeover switch. The voice extracted by the transmitter is supplied to the transceiver. The transmitter signal input to the phase converter is inverted in phase there and output to the changeover switch. Then, one of the transmitter signal from the transmitter (without phase inversion) and the transmitter signal whose phase has been inverted by the phase converter is switched via the switch according to the setting state of the switch. Output to the synthesizer. On the other hand, a reception signal is output from the transceiver to the synthesizer. The transmitter signal and the received signal input to the combiner are combined there and supplied to the receiver as a combined signal. Therefore, when the changeover switch outputs the transmitter signal whose phase is inverted by the setting, the sound (noise) around the user is canceled and the received signal from the transceiver can be clearly heard. If the transmitter signal is output without phase inversion, the sound around the user can be heard at a higher volume. Therefore, the handset can be properly used according to the application.

According to a second aspect of the present invention, in the handset according to the first aspect, there is provided a band-pass filter for passing a predetermined frequency band of a transmitter signal extracted from the transmitter, and An inverter inverts the phase of the transmitter signal that has passed through the bandpass filter, and the changeover switch has a transmitter signal that has passed through the bandpass filter and has been inverted in phase by the phase inverter. , The transmitter signal that has passed through the band-pass filter can be switched and output by setting. Therefore, a predetermined band (for example, a voice band,
Noise band). Therefore, when the changeover switch outputs the transmitter signal whose phase is inverted by the setting, the effect of canceling the surrounding sound (noise) can be increased, and the transmitter signal whose phase is not inverted is output. In this case, the sound around the user can be clearly heard.

According to a third aspect of the present invention, there is provided the handset according to the first or second aspect, further comprising a band-pass filter that passes a predetermined frequency band of a transmitter signal extracted from the transmitter. The transmitter signal passed through the band-pass filter is supplied to the transceiver as a transmission signal. Therefore, clear voice can be transmitted to the other party who talks via the transceiver.

[0010] The invention described in claim 4 is the first to third aspects of the present invention.
The handset according to any one of the above, further comprising an amplifier for amplifying the combined signal output from the combiner and outputting the amplified signal as an amplified signal, and supplying the amplified signal output from the amplifier to the receiver. . Therefore, if the changeover switch outputs a transmitter signal whose phase is not inverted due to the setting, the surrounding sound of the user can be heard even louder.

[0011] The invention according to claim 5 provides the invention according to claims 1 to 4.
The handset according to any one of the above, further comprising a detector that detects a reception signal output from the transceiver, the detector, when detecting the reception signal, the setting signal to the changeover switch to the switch The changeover switch is configured to output the transmitter signal whose phase has been inverted by the phase inverter in accordance with the setting signal. Therefore, it is possible to automatically switch to a mode for canceling the sound (noise) around the user without bothering the user.

According to a sixth aspect of the present invention, there is provided a handset attached to a transceiver, wherein the handset is attached to a user's ear, is separated from the handset by a predetermined distance, and a noise signal is extracted from ambient noise. Transmitter, and a phase inverter that inverts the phase of the noise signal extracted from the transmitter, a reception signal output from the transceiver, and a noise signal whose phase is inverted by the phase inverter, And a combiner for combining the signals and outputting the combined signal as a combined signal. The combined signal output from the combiner is supplied to the receiver. Therefore,
The noise around the user is canceled, and the reception signal from the transceiver can be clearly heard.

According to a seventh aspect of the present invention, in the handset according to the sixth aspect, there is provided a band-pass filter for passing a predetermined frequency band of a noise signal extracted from the transmitter, and the phase inverter Inverts the phase of the noise signal that has passed through the band-pass filter, and the combiner receives the reception signal output from the transceiver, passes through the band-pass filter, and reverses the phase by the phase inverter. The noise signal thus synthesized is combined with the noise signal and output as a combined signal. Therefore, the effect of canceling surrounding sounds (noise) can be increased.

[0014] The invention according to claim 8 is the invention according to claims 1 to 7.
In the handset according to any of the above,
Configure to be a mobile phone. Therefore, it is possible to connect to a mobile phone and talk with clear voice.

The invention described in claim 9 is the first to eighth aspects of the present invention.
The handset according to any one of the above, wherein the handset is an earphone.

According to a tenth aspect of the present invention, in the handset according to any one of the first to eighth aspects, the handset comprises:
It is configured to be headphones.

An invention according to claim 11 is a handset attached to a transceiver, wherein the handset is attached to a user's ear, is separated from the handset by a predetermined distance, and transmits a surrounding sound to a handset signal. A transmitter that extracts as, a receiver signal output from the transceiver, and a transmitter signal extracted from the transmitter, and a synthesizer that combines and outputs a synthesized signal.
And supplying the synthesized signal output from the synthesizer to the receiver so as to be usable as a hearing aid.

According to a twelfth aspect of the present invention, in the handset according to the eleventh aspect, the handset further includes a band-pass filter that allows a predetermined frequency band of a transmitter signal extracted from the transmitter to pass therethrough. The transmitter is configured to combine the reception signal output from the transceiver and the transmitter signal that has passed through the band-pass filter, and output the resultant signal as a composite signal.

According to a thirteenth aspect of the present invention, in the handset according to the eleventh or twelfth aspect, there is provided an amplifier for amplifying a combined signal output from the combiner and outputting the amplified signal as an amplified signal. The amplified signal is supplied to the receiver.

[0020]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a schematic configuration of a handset 100 according to an embodiment of the present invention. As shown in FIG. 1, the handset 100 is roughly composed of an audio signal processing circuit 1, a handset 2, and a handset 3. The receiver 2 and the transmitter 3 are connected to the audio signal processing circuit 1 via a cable 5a. The handset 100 has a cable 5
b, it is detachably connected to an audio signal input terminal and an audio signal output terminal of the transceiver 4. Here, in the present embodiment, the handset 4 will be described as a mobile phone. Receiving signal (voice signal) received by transceiver 4
Is output to the receiver 2 via the audio signal output terminal, the cable 5b, the audio signal processing circuit 1, and the cable 5a.
The surrounding sound extracted by the transmitter 3 is output as a transmitter signal to the transmitter / receiver 4 via the cable 5a, the audio signal processing circuit 1, the cable 5b, and the audio signal output terminal.

The receiver 2 and the transmitter 3 are separated by a predetermined distance. For example, the receiver 2 is attached to the user's ear,
The transmitter 3 is held by the user himself or worn on a collar of clothes. The receiver 2 has a built-in speaker 2,
Sound is output from the speaker 2. The receiver 2 includes an earphone, a headphone, and the like. The transmitter 3 is a microphone (microphone) capable of extracting (collecting) the voice of a person around the user and the surrounding noise (noise). Further, the transmitter 3 can extract the user's own voice by separating the receiver 2 from the receiver 2 by a predetermined distance.

The audio signal processing circuit 1 includes a band pass filter (BPF) 10, a phase inverter 11, a changeover switch 12, a synthesizer 13, and an amplifier (AMP) 14. It is housed integrally in a predetermined box. The BPF 10 allows signals in a voice band and a noise band to pass through among the transmitter signals extracted by the transmitter 3. The phase inverter 11 inverts the phase of the transmitter signal that has passed through the BPF 10 and outputs the inverted signal. The changeover switch 12 is used to select one of a transmitter signal whose phase has been inverted by the phase inverter 11 and output, and a transmitter signal that does not pass through the phase inverter 11 (a transmitter signal immediately after passing through the BPF 10). Can be switched by setting. That is, when the movable contact c of the changeover switch 12 is connected to the contact a (hereinafter referred to as “ac contact conduction”), the transmitter signal whose phase is inverted is output, and the movable contact c of the changeover switch 12 is output. Is connected to the contact b (hereinafter referred to as “bc contact conduction”), a transmitter signal whose phase is not inverted is output. Switching between the ac contact conduction state and the bc contact conduction state can be arbitrarily performed by the user according to the intended use by a button (not shown) provided on the surface of the box containing the audio signal processing circuit 1. it can. In addition to the mechanical switch that is manually switched by the user, the changeover switch 12 includes an electromagnetic switch, a transistor, or a transistor that automatically switches by receiving a predetermined signal, for example, a signal from the transceiver 4. Switches using FETs and switches using thyristors are also included. The combiner 13 combines the transmitter signal output from the changeover switch 12 and the received signal output from the transceiver 4, and outputs the combined signal as a combined signal.
The amplifier (AMP) 14 amplifies and outputs the combined signal output from the combiner 13. Then, the synthesized signal is output to the receiver 2. On the other hand, the transmitter signal that has passed through the BPF 10 is also output to the transceiver 4 via the route indicated by reference numeral 18 in FIG. At the position of the BPF 10, a BPF for passing a signal in a voice band and a BPF for passing a signal in a noise band may be provided in parallel. Further, the configuration may be such that the BPF 10 and the AMP 14 are not provided.

In the above configuration, the handset 100 is
By switching the changeover switch 12, it is used both for connecting to the transmitter / receiver 4 to obtain a clear call voice even under noise and for use as a hearing aid for amplifying and listening to the voices of surrounding people. Can be applied. In addition,
The technology relating to the mobile phone as the transceiver 4 has no direct relation to the present invention, and will not be described in detail here.

FIG. 2 shows a signal flow in the case of connecting to the transmitter / receiver 4 and using it to obtain a clear speech voice even under noise. Hereinafter, referring to FIG.
The operation of the handset 100 in this case will be described.

First, the user puts the receiver 2 on his ear,
The transmitter 3 is held close to the mouth with the hand, or the transmitter 3 is attached to a collar with a clip or the like provided near the mouth to approach the mouth. Next, when the user sets a button (not shown) provided on the surface of the box that houses the audio signal processing circuit 1 for a call, the changeover switch 12 is brought into the ac contact conduction state accordingly. And the user
By a predetermined operation of the transceiver 4, a call with the other party is started.

When a call is started and the user speaks,
The voice of the user and the surrounding noise are extracted by the transmitter 3 as a voice signal 23 and a noise signal 21. The audio signal 23 and the noise signal 21 are transmitted to the B
Input to PF10. The BPF 10 passes the voice band and the noise band of the input voice signal 23 and noise signal 21. Then, the audio signal 23 and the noise signal 21 that have passed through the BPF 10 pass through the route indicated by reference numeral 18 in the audio signal processing circuit 1 as a transmission signal, and are transmitted through the cable 5b.
Is input to the transceiver 4 via the. The transceiver 4 removes the noise signal 21 from the input audio signal 23 and noise signal 21 with a filter or the like, and transmits the audio signal 23 to the transceiver of the other party. It should be noted that a BPF for passing only the audio band is provided at the route indicated by reference numeral 18 in the audio signal processing circuit 1, where the noise signal 21 is removed and only the audio signal 23 is output to the transceiver 4. Is also good.

On the other hand, a voice signal emitted by the other party is received by the transceiver 4. The received signal is the received signal 2
It is output as 0 and input to the synthesizer 13 via the cable 5b. On the other hand, noise around the user is extracted as a noise signal 21 by the transmitter 3 and is input to the BPF 10 via the cable 5a. The BPF 10 allows the noise band of the input noise signal 21 to pass. And BP
The noise signal 21 that has passed through F10 is input to the phase inverter 11, where the phase is inverted and output. The noise signal 22 whose phase has been inverted is input to the synthesizer 13 via the changeover switch 12. The combiner 13 combines the input reception signal 20 and the noise signal 22 having the inverted phase, and outputs the combined signal 24 as a combined signal 24. The synthesized signal 24 output from the synthesizer 13 is amplified by the AMP 14 and input to the receiver 2 via the cable 5a. The composite signal 24 input to the receiver 2 is output as sound by the speaker 15. Thus, the noise based on the noise signal 21 is canceled between the speaker 15 and the eardrum of the user's ear by the sound of the noise signal 22 whose phase is inverted among the sounds output from the speaker 15.
Therefore, the user can hear a clear voice of the other party even when talking with the receiver 4 under noise.

FIG. 3 shows a signal flow when the hearing aid is used to amplify and listen to the voices of surrounding people. The operation of handset 100 in this case will be described below with reference to FIG.

First, the user puts the receiver 2 on his ear,
The transmitter 3 is attached to the receiver 2, a collar, or the like with a clip or the like provided so as to approach the ear. next,
When the user sets the button provided on the surface of the box containing the audio signal processing circuit 1 for the hearing aid, the changeover switch 12 is brought into the bc contact conduction state accordingly. A sound around the user, for example, a sound emitted by a person around the user is transmitted by the transmitter 3 to an audio signal 25.
Is extracted as The audio signal 25 is input to the BPF 10 via the cable 5a. The BPF 10 passes an audio band of the input audio signal 25. And B
The audio signal 25 that has passed through the PF 10 is input to the AMP 14 via the changeover switch 12 and the synthesizer 13.
The AMP 14 amplifies the input audio signal 25 and outputs it as an amplified audio signal 26. The amplified audio signal 26 is input to the receiver 2 via the cable 5a. Handset 2
Is output as sound by the speaker 15. As a result, the sound around the user is amplified and becomes loud and enters the user's ear. Also, when the transceiver 4 is in a call state, the user can talk while listening to the amplified sound of the surroundings.

FIG. 4 is a diagram showing a configuration in which a detector 50 is added to the configuration shown in FIG. In FIG. 4, when a reception signal is output from the transceiver 4, the detector 50
Detect this. Next, the detector 50 gives the changeover switch 12 a signal for setting the ac contact to a conductive state. The changeover switch 12 sets the ac contact conduction state in response to the signal. Thus, even when the changeover switch 12 is in the bc contact conducting state and the user uses the handset 100 as a hearing aid, the switch of FIG.
The mode can be switched to the mode used to obtain the clear call voice described in the above. In the example shown in FIG. 4, a timer is provided in the detector 50, and when a reception signal from the transceiver 4 is not detected for a certain period of time, the switch 12 is set to the bc contact conduction state. It may be configured to output a signal. This allows
After the user finishes communication with the communication partner, the mode can be automatically switched to a mode used as a hearing aid.

In this embodiment, the handset 1
Although the example in which 00 is used by connecting it to a mobile phone has been described, it is of course possible to connect it to a portable audio playback device and use it to listen to music.

[0033]

As described above, according to the present invention,
Not only can the handset be connected to a portable sound reproducing device to listen to clear music even under noisy conditions, but also the handset can be connected to a transceiver so that the It can be switched to use both for listening to clear voice and sending voice to the other party and for amplifying and listening to the voice of the surrounding people as a hearing aid. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a handset according to an embodiment of the present invention.

FIG. 2 is a diagram showing a signal flow when used to obtain a clear call voice even under noise by connecting to a transceiver.

FIG. 3 is a diagram illustrating a signal flow when the hearing aid is used to amplify and listen to the voice of a surrounding person.

FIG. 4 is a diagram showing a configuration obtained by adding a detector to the configuration shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Audio signal processing circuit 2 ... Receiver 3 ... Transmitter 4 ... Transceiver 5a, 5b ... Cable 10 ... BPF 11 ... Phase inverter 12 ... Changeover switch 13 ... Synthesizer 14 ... AMP 15 ... Speaker 50 ... Detector 100 … Handset

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenko, 1105 Kunomoto Nikko, Tendo City, Yamagata Prefecture F-term in Tohoku Pioneer Corporation (reference) 5D020 AC05 BB09 5K023 AA07 BB06 EE12 NN06 PP02 PP12 5K027 AA11 BB03 DD12 DD16 DD18 HH03 MM04

Claims (13)

[Claims] 1. A handset attached to a transceiver, comprising: a handset mounted on a user's ear; a handset separated by a predetermined distance from the handset and extracting surrounding sounds as a handset signal; A phase inverter for inverting the phase of the transmitter signal extracted from the transmitter, a transmitter signal extracted from the transmitter, and a transmitter signal phase inverted by the phase inverter A changeover switch capable of switching and outputting any one of the above, and a combiner that combines the reception signal output from the transceiver and the transmitter signal output from the changeover switch and outputs the combined signal. And supplying a transmitter signal extracted from the transmitter as a transmission signal to the transceiver, and supplying a composite signal output from the synthesizer to the receiver. Handset . 2. The apparatus according to claim 1, further comprising: a band-pass filter that allows a predetermined frequency band of the transmitter signal extracted from the transmitter to pass therethrough; The changeover switch is configured to switch any one of a transmitter signal that has passed through the band-pass filter and is phase-inverted by the phase inverter and a transmitter signal that has passed through the band-pass filter. 2. The handset according to claim 1, wherein the handset can be switched and output by setting. 3. A band-pass filter that passes a predetermined frequency band of a transmitter signal extracted from the transmitter, and transmits the transmitter signal that has passed through the band-pass filter to the transceiver. The handset according to claim 1, wherein the handset is supplied as a speech signal. 4. An amplifier for amplifying a combined signal output from the combiner and outputting the amplified signal as an amplified signal, wherein the amplified signal output from the amplifier is supplied to the receiver. 3. The handset according to any one of 3. 5. A detector for detecting a reception signal output from the transceiver, wherein the detector supplies a setting signal to the changeover switch when detecting the reception signal, the changeover switch comprising: The handset according to any one of claims 1 to 4, wherein the setting is such that a handset signal whose phase has been inverted by the phase inverter is output in response to the setting signal. 6. A handset attached to a transceiver, comprising: a handset attached to a user's ear; a handset spaced a predetermined distance from the handset and extracting a noise signal from ambient noise; A phase inverter for inverting the phase of the noise signal extracted from the transmitter, a reception signal output from the transceiver, and a noise signal whose phase has been inverted by the phase inverter, and output as a synthesized signal A handset that supplies the synthesized signal output from the synthesizer to the handset. 7. A band-pass filter for passing a predetermined frequency band of the noise signal extracted from the transmitter, wherein the phase inverter inverts a phase of the noise signal passing through the band-pass filter, The synthesizer synthesizes a reception signal output from the transceiver and a noise signal that passes through the band-pass filter and is inverted in phase by the phase inverter, and outputs the synthesized signal. The handset according to claim 6, wherein: 8. The handset according to claim 1, wherein the transceiver is a mobile phone. 9. The handset according to claim 1, wherein the handset is an earphone. 10. The handset according to claim 1, wherein the handset is a headphone. 11. A handset attached to a transceiver, comprising: a handset mounted on a user's ear; a handset separated from the handset by a predetermined distance to extract surrounding sounds as a handset signal. A combiner that combines the reception signal output from the transceiver and the transmitter signal extracted from the transmitter and outputs the resultant signal as a composite signal; and a combined signal output from the combiner. The handset can be used as a hearing aid by supplying the handset to the handset. 12. A band-pass filter for passing a predetermined frequency band of a transmitter signal extracted from the transmitter, wherein the combiner includes: a receiver signal output from the transceiver; A handset signal that has passed through the filter,
The handset according to claim 11, wherein the signal is combined and output as a combined signal. 13. An amplifier for amplifying a combined signal output from the combiner and outputting the amplified signal as an amplified signal, wherein the amplified signal output from the amplifier is supplied to the handset. 13. The handset according to claim 12.