JP4027009B2 - Handset - Google Patents

Description

[0001]
BACKGROUND 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 device or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an earphone or a headphone with a noise reduction function is known as an earphone or a headphone used for a portable sound reproducing device (a device that reproduces sound recorded on a cassette tape, CD, or MD).
[0003]
For example, a microphone is installed inside the headphones, and noise around the user's ear is collected by the microphone, and the phase is inverted and output to the headphones. 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]
[Problems to be solved by the invention]
However, since such earphones or headphones are used for the purpose of facilitating listening to music under noisy in a portable sound reproduction device, they are only a unidirectional information transmission means and should be used for other purposes. I can't.
[0005]
Therefore, the present invention has been made in view of the above points, and an object thereof is to provide a handset that can be used for various purposes.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the invention described in claim 1 is a handset attached to a transceiver, the handset attached to a user's ear, and spaced apart from the handset by a predetermined distance. A transmitter that extracts voice and surrounding sounds as a transmitter signal, a phase inverter that inverts and outputs the phase of the input transmitter signal, and a transmitter signal extracted from the transmitter as it is to be output, the phase inverted to be output to transmitter signal, and the changeover switch to obtain cut conversion and a reception signal output from the transceiver, which is outputted from the changeover switch by the phase inverter A transmitter that synthesizes and outputs a synthesized signal, and supplies the transmitter signal extracted from the transmitter as a transmitted signal to the transceiver; Output from the instrument A signal is provided to the handset.
[0007]
According to the invention thus configured, the user's voice and surrounding sounds are extracted as a transmitter signal by the transmitter, and are 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 then inverted in phase and output to the changeover switch. Then, either the transmitter signal from the transmitter (no phase inversion) or the transmitter signal whose phase has been inverted by the phase converter is passed through the changeover switch depending on the setting state of the changeover switch. Output to the combiner. On the other hand, a reception signal is output from the transceiver to the combiner. 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 a transmitter signal whose phase has been inverted according to the setting, the sound (noise) around the user is canceled and the received signal from the transceiver can be heard clearly. If a transmitter signal that is not phase-inverted is output, the sound around the user can be increased and heard. Therefore, the handset can be properly used according to the application.
[0008]
The invention according to claim 2 is the handset according to claim 1, further comprising a bandpass filter that passes a voice band and a noise band of the transmitter signal, and the phase inverter includes the bandpass filter. The phase of the transmitter signal that has passed is inverted, and the changeover switch passes the bandpass filter, and the transmitter signal that has been phase-inverted by the phase inverter and the transmitter that has passed the bandpass filter. Any one of the speaker signals can be switched and output. Therefore, a predetermined band (for example, voice band, noise band) can be passed from the transmitter signal in the invention of claim 1 by the band pass filter. Therefore, when the changeover switch outputs a transmitter signal whose phase is inverted according to the setting, the effect of canceling the surrounding sound (noise) can be increased, and a transmitter signal which is not inverted in phase is output. In some cases, the sound around the user can be heard clearly.
[0009]
The invention according to claim 3 is the transmitter / receiver according to claim 1, further comprising a band pass filter that passes a voice band and a noise band of the transmitter signal, and the transmitter signal that has passed through the band pass filter. Is supplied to the transceiver as a transmission signal. Therefore, clear voice can be sent to the other party who talks via the transceiver.
[0010]
According to a fourth aspect of the present invention, the transmitter / receiver according to any one of the first to third aspects further comprises an amplifier that amplifies the combined signal output from the combiner and outputs the amplified signal as an amplified signal. The amplified signal is supplied to the handset. Therefore, when the changeover switch outputs a transmitter signal that is not phase-inverted according to the setting, the sound around the user can be further increased and heard.
[0011]
A fifth aspect of the present invention is the transmitter / receiver according to any one of the first to fourth aspects, further comprising a detector that detects a received signal output from the transmitter / receiver, wherein the detector detects the received signal. When detected, a setting signal is given to the changeover switch, and the changeover switch is configured to output a transmitter signal whose phase is inverted by the phase inverter corresponding to the setting signal. To do. Therefore, it is possible to automatically switch to a mode for canceling sounds (noise) around the user without bothering the user.
[0012]
According to a sixth aspect of the present invention, there is provided a transmitter / receiver attached to a transmitter / receiver, wherein the receiver is attached to a user's ear, and is separated from the receiver by a predetermined distance to transmit a user's voice and surrounding sounds. a transmitter for extracting as a vessel signal, a phase inverter for inverting the phase of the transmitter signal extracted from the transmitter, and the reception signal output from the transceiver, the phase inversion by the phase inverter is equipped telephone transmitter signal and, a combiner for outputting a synthesized synthesis signal, and constitutes a synthesized signal output from the synthesizer to supply to the handset. Therefore, the noise around the user is canceled and the received signal from the transceiver can be heard clearly.
[0013]
The invention described in claim 7 is the handset according to claim 6, further comprising a bandpass filter that passes a predetermined frequency band of the transmitter signal extracted from the transmitter , wherein the phase inverter is Inverting the phase of the transmitter signal that has passed through the bandpass filter, and the synthesizer passes the received signal output from the transceiver, passes through the bandpass filter, and is phased by the phase inverter. The inverted transmitter signal is synthesized and output as a synthesized signal. Therefore, the effect of canceling out surrounding sounds (noise) can be increased.
[0014]
According to an eighth aspect of the present invention, in the handset according to any one of the first to seventh aspects, the transceiver is configured to be a mobile phone. Therefore, it is possible to make a call with clear voice by connecting to the mobile phone.
[0015]
According to a ninth aspect of the present invention, in the handset according to any one of the first to eighth aspects, the handset is configured as an earphone.
[0016]
According to a tenth aspect of the present invention, in the handset according to any one of the first to eighth aspects, the handset is configured to be headphones.
[0017]
The invention according to claim 11 is a transmitter / receiver attached to a transmitter / receiver, wherein the receiver is attached to a user's ear, and is separated from the receiver by a predetermined distance to transmit a user's voice and surrounding sounds. A transmitter that extracts as a transmitter signal, and a combiner that combines the received signal output from the transceiver and the transmitter signal extracted from the transmitter, and outputs the combined signal as a combined signal, The composite signal output from the synthesizer is supplied to the receiver so that it can be used as a hearing aid.
[0018]
A twelfth aspect of the present invention is the transmitter / receiver according to the eleventh aspect, further comprising a bandpass filter that passes a voice band and a noise band of a transmitter signal extracted from the transmitter, and the synthesizer includes: The reception signal output from the transceiver and the transmitter signal that has passed through the band-pass filter are combined and output to the receiver as a combined signal.
[0019]
The invention according to claim 13 is the handset according to claim 11 or 12, further comprising an amplifier that amplifies the combined signal output from the combiner and outputs the amplified signal as an amplified signal. A signal is provided to the handset.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0021]
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 transmitter 3 are connected to the audio signal processing circuit 1 via a cable 5a. The handset 100 is detachably connected to the audio signal input terminal and the audio signal output terminal of the transceiver 4 via the cable 5b. Here, in the present embodiment, the handset 4 will be described as a mobile phone. The reception signal (audio signal) received by the 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 ambient 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.
[0022]
The handset 2 and the handset 3 are separated from each other by a predetermined distance. For example, the handset 2 is attached to the user's ear, and the handset 3 can be held by the user himself or a clothes collar. It is attached to. The receiver 2 has a built-in speaker 2 and outputs sound from the speaker 2. The receiver 2 includes earphones, headphones, and the like. The transmitter 3 is a microphone (microphone) that can extract (sound collection) voices of people around the user and ambient noise. Furthermore, the transmitter 3 can extract the user's own voice by being separated from the receiver 2 by a predetermined distance.
[0023]
The audio signal processing circuit 1 includes a band pass filter (BPF) 10, a phase inverter 11, a changeover switch 12, a combiner 13, and an amplifier (AMP) 14, and each component is a predetermined box. It is housed in one piece. The BPF 10 passes signals in the voice band and noise band 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 change-over switch 12 is either a transmitter signal that has been output with its phase inverted by the phase inverter 11, or a transmitter signal that does not pass through the phase inverter 11 (a transmitter signal that has just passed through the BPF 10). Can be switched and output 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”), a 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 housing the audio signal processing circuit 1. it can. In addition to the mechanical switch that is manually switched by the user, the change-over switch 12 includes an electromagnetic switch, a transistor, or a switch that automatically switches in response to a predetermined signal, for example, a signal from the transceiver 4 Also included are switches using FETs, switches using thyristors, and the like. 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 through the route indicated by reference numeral 18 in FIG. Note that the BPF 10 may be divided into a BPF that passes a signal in the voice band and a BPF that passes a signal in the noise band, and these may be provided in parallel. Moreover, you may comprise without providing BPF10 and AMP14.
[0024]
In the above configuration, the handset 100 is connected to the transmitter / receiver 4 by switching the changeover switch 12 and used to obtain a clear call voice even under noise, and amplifies the voices of surrounding people as a hearing aid. Applicable for both listening and use. Since the technology related to the mobile phone as the transceiver 4 is not directly related to the present invention, detailed description thereof will not be given here.
[0025]
FIG. 2 shows a signal flow when used to connect to the transmitter / receiver 4 to obtain clear call voice even under noise. The operation of the handset 100 in this case will be described below with reference to FIG.
[0026]
First, the user puts the handset 2 on the ear and holds the handset 3 in his hand, close to the mouth, or attaches the handset 3 to the collar with a clip or the like provided therein. Close. Next, when the user sets a button (not shown) provided on the surface of the box housing the audio signal processing circuit 1 for calling, the change-over switch 12 is in an ac contact conduction state accordingly. Then, the user starts a call with the call partner by a predetermined operation of the transceiver 4.
[0027]
When a telephone call is started and the user speaks, the voice of the user and ambient noise are extracted as a voice signal 23 and a noise signal 21 by the transmitter 3. The audio signal 23 and the noise signal 21 are input to the BPF 10 via the cable 5a. The BPF 10 passes the voice band and 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 of reference numeral 18 in the audio signal processing circuit 1 as a transmission signal, and are input to the transceiver 4 via the cable 5b. The transmitter / receiver 4 removes the noise signal 21 from the input audio signal 23 and noise signal 21 by a filter or the like, and transmits the audio signal 23 to the other party's transmitter / receiver. A BPF that passes only the voice band is provided in the route of the reference numeral 18 in the voice signal processing circuit 1, and the noise signal 21 is removed and only the voice signal 23 is output to the transceiver 4. Also good.
[0028]
On the other hand, the signal of the voice uttered by the other party is received by the transceiver 4. The received signal is output as a reception signal 20 and input to the synthesizer 13 via the cable 5b. On the other hand, the noise around the user is extracted as the noise signal 21 by the transmitter 3 and input to the BPF 10 via the cable 5a. The BPF 10 passes the noise band of the input noise signal 21. The noise signal 21 that has passed through the BPF 10 is input to the phase inverter 11 where the phase is inverted and output. The noise signal 22 whose phase is inverted is input to the synthesizer 13 via the changeover switch 12. In the synthesizer 13, the received reception signal 20 and the noise signal 22 whose phase is inverted are synthesized and output as a synthesized signal 24. The combined signal 24 output from the combiner 13 is amplified by the AMP 14 and input to the receiver 2 via the cable 5a. The synthesized signal 24 input to the receiver 2 is output as sound by the speaker 15. As a result, the noise that is the basis of the noise signal 21 is canceled by the sound of the noise signal 22 whose phase is reversed among the sounds output from the speaker 15 between the eardrum of the user's ear from the speaker 15. Therefore, the user can hear the clear voice of the other party even when making a call with the receiver 4 under noise. According to FIG. 2, not only the noise signal 22 whose phase is inverted but also the voice signal of the user whose phase is inverted by the phase inverter 11 and the input received signal 20 are synthesized by the synthesizer 13. However, the other party usually speaks alternately with the other party, and his voice is transmitted to the ear in various phases even on a general telephone, and is input as the voice signal of the user whose phase is reversed. Even if the circuit configuration of FIG. 2 is synthesized with the received signal 20 by the synthesizer 13, there is no problem and the clear voice of the other party can be heard.
[0029]
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 the handset 100 in this case will be described below with reference to FIG.
[0030]
First, the user attaches the receiver 2 to the ear, and attaches the transmitter 3 to the receiver 2 or a collar by using a clip or the like provided for the receiver 3 in proximity to the ear. Next, when the user sets a button provided on the surface of the box housing the audio signal processing circuit 1 for the hearing aid, the changeover switch 12 is brought into a bc contact conduction state accordingly. Then, the sound around the user, for example, the voice uttered by a person around the user is extracted as the voice signal 25 by the transmitter 3. The audio signal 25 is input to the BPF 10 via the cable 5a. The BPF 10 passes the audio band of the input audio signal 25. The audio signal 25 that has passed through the BPF 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 through the cable 5a. The amplified audio signal 26 input to the receiver 2 is output as sound by the speaker 15. As a result, the sound around the user is amplified and enters the user's ear as a loud sound. Further, even when the transceiver 4 is in a call state, the user can make a call while listening to the surrounding amplified sound.
[0031]
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 detects this. Next, the detector 50 gives a signal to the changeover switch 12 for setting the ac contact to be in a conductive state. The changeover switch 12 is set to the ac contact conduction state in response to the signal. Thus, even when the change-over switch 12 is in the bc contact conduction state and the user is using the handset 100 as a hearing aid, the user can automatically perform FIG. 2 without bothering the user. It is possible to switch to the mode used for obtaining the clear call voice described in (1). In the example shown in FIG. 4, a timer is provided in the detector 50, and when the reception signal from the transceiver 4 is not detected for a certain period of time, the switch switch 12 is set in a bc contact conduction state. You may comprise so that a signal may be output. Thereby, after the communication with the communication partner by the user is completed, it is possible to automatically switch to a mode for use as a hearing aid.
[0032]
In the present embodiment, an example in which the handset 100 is connected to a mobile phone has been described. However, it is of course possible to connect to a portable sound reproducing device and use it for listening to music.
[0033]
【The invention's effect】
As described above, according to the present invention, not only can a handset be connected to a portable sound reproducing device to be used for listening to clear music even under noisy conditions, but the handset can also be used as a transceiver. Both for use in listening to the clear voice of the other party even under noisy conditions and for sending the voice to the other party, and as a hearing aid It can be used by switching as needed.
[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 illustrating a signal flow when used to connect to a transceiver and obtain clear call voice even under noise.
FIG. 3 is a diagram showing a signal flow when used as a hearing aid to amplify and hear the voices of surrounding people.
4 is a diagram showing a configuration in which a detector is added to the configuration shown in FIG. 1; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Audio | voice signal processing circuit 2 ... Receiver 3 ... Transmitter 4 ... Transmitter / receiver 5a, 5b ... Cable 10 ... BPF
11 ... Phase inverter 12 ... Changeover switch 13 ... Synthesizer 14 ... AMP
15 ... Speaker 50 ... Detector 100 ... Handset

Claims (13)

A handset attached to a transceiver,
A handset worn in the user's ear;
A transmitter that is separated from the receiver by a predetermined distance and extracts a user's voice and surrounding sounds as a transmitter signal;
A phase inverter that inverts and outputs the phase of the input transmitter signal;
A changeover switch for switching between outputting the transmitter signal extracted from the transmitter as it is or outputting the transmitter signal whose phase is inverted by the phase inverter,
A synthesizer that synthesizes the received signal output from the transceiver and the transmitter signal output from the changeover switch and outputs the synthesized signal,
A transmitter / receiver characterized in that a transmitter signal extracted from the transmitter is supplied as a transmission signal to the transceiver, and a combined signal output from the combiner is supplied to the receiver. A band-pass filter that passes the voice band and noise band of the transmitter signal;
The phase inverter inverts the phase of the transmitter signal that has passed through the bandpass filter,
The change-over switch is capable of switching and outputting either a transmitter signal that has passed through the band-pass filter and whose phase has been inverted by the phase inverter, and a transmitter signal that has passed through the band-pass filter. The handset according to claim 1, wherein the handset is provided. A band-pass filter that passes the voice band and noise band of the transmitter signal;
The handset according to claim 1, wherein the handset signal that has passed through the band-pass filter is supplied to the transceiver as a speech signal. An amplifier that amplifies the combined signal output from the combiner and outputs the amplified signal as an amplified signal;
The handset according to any one of claims 1 to 3, wherein the amplified signal output from the amplifier is supplied to the handset. A detector for detecting a received signal output from the transceiver;
When the detector detects the reception signal, the detector gives a setting signal to the changeover switch,
The handset according to any one of claims 1 to 4, wherein the change-over switch is set to output a handset signal whose phase is inverted by the phase inverter corresponding to the setting signal. A handset attached to a transceiver,
A handset worn in the user's ear;
A transmitter that is separated from the receiver by a predetermined distance and extracts a user's voice and surrounding sounds as a transmitter signal ;
A phase inverter for inverting the phase of the transmitter signal extracted from the transmitter ;
A synthesizer that synthesizes the received signal output from the transceiver and the transmitter signal phase-inverted by the phase inverter and outputs the synthesized signal,
A transmitter / receiver characterized in that a combined signal output from the combiner is supplied to the receiver. A band-pass filter that passes the voice band and noise band of the transmitter signal extracted from the transmitter ;
The phase inverter inverts the phase of the transmitter signal that has passed through the bandpass filter,
The synthesizer includes a reception signal outputted from said transceiver, through the band-pass filter, and the transmitter signal and whose phase has been inverted by the phase inverter, the handset as a combined synthesized signal The handset according to claim 6, wherein the handset is output.   The handset according to any one of claims 1 to 7, wherein the transceiver is a mobile phone.   The handset according to any one of claims 1 to 8, wherein the handset is an earphone.   The handset according to any one of claims 1 to 8, wherein the handset is a headphone. A handset attached to a transceiver,
A handset worn in the user's ear;
A transmitter that is separated from the receiver by a predetermined distance and extracts a user's voice and surrounding sounds as a transmitter signal;
A synthesizer that synthesizes the received signal output from the transceiver and the transmitter signal extracted from the transmitter and outputs the synthesized signal,
A handset which can be used as a hearing aid by supplying a composite signal output from the combiner to the handset. A band-pass filter that passes the voice band and noise band of the transmitter signal extracted from the transmitter;
The said combiner synthesize | combines the received signal output from the said transmitter / receiver, and the transmitter signal which passed the said band pass filter, and outputs it to the said receiver as a synthesized signal. Handset. An amplifier that amplifies the combined signal output from the combiner and outputs the amplified signal as an amplified signal;
The handset according to claim 11 or 12, wherein an amplified signal output from the amplifier is supplied to the handset.

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