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JPH05130696

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH05130696
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for
use, for example, when a deaf person using a hearing aid listens to high-fidelity audio with an
audio device or when simultaneously teaching a large number of deaf people in the deaf class.
The present invention relates to a binaural type cordless hearing aid.
[0002]
2. Description of the Related Art Conventionally, when a deaf person listens to music by means of
an audio device, he / she wears a hearing aid having a response characteristic corresponding to
the deafness characteristic to listen to voice.
[0003]
On the other hand, a cordless hearing aid system using infrared rays was used to simultaneously
educate a large number of deaf students in the deaf class.
[0004]
Such a cordless hearing aid system is configured such that each deaf person wears a headphone
and an infrared signal is transmitted to an infrared receiver attached to the headphone, whereby
all the members can simultaneously listen to the same voice. There is.
[0005]
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[Problems to be solved by the invention] Those who use a hearing aid usually wear a hearing aid
on only one ear, so it is difficult to listen as a high fidelity stereo even though it can be heard as
monoral when listening to audio. Met.
[0006]
In addition, in the infrared or cordless hearing aid system used, each deaf person is configured to
use headphones, and wearing the headphones on the hearing aid causes howling, so it is
necessary to remove the hearing aid and then wear the headphones Yes, it was inconvenient.
[0007]
In such a cordless hearing aid system, the receiver connected or built into the headphone is
configured to incorporate the hearing aid characteristic of the user, so that the headphone and
receiver can be used by other deaf persons and the general public. Has the disadvantage of being
unable to
[0008]
In view of the foregoing, the present invention provides a binaural cordless hearing aid that can
be used by a large number of people with hearing aids and can simultaneously listen to high
fidelity stereo audio while wearing a hearing aid. It is to provide.
[0009]
A binaural type cordless hearing aid according to the present invention comprises a transmitter
10 having an infrared generator 12 and an infrared receiver for receiving an infrared signal from
the infrared generator 12, as shown in FIG. 1, for example. The infrared signal is modulated to
carry stereo sound, and a receiver 30 having a receiver 32 and a headphone 34 connected to the
receiver 30 and able to be worn with the aid of the hearing aid.
[0010]
In the binaural type cordless hearing aid device of the present invention, for example, as shown
in FIG. 2, the transmitter 10 is provided with a characteristic adjustment equalizer 16 so that the
characteristic of the voice becomes substantially equal to the characteristic of a naked ear to a
frontal sound source. .
[0011]
According to the present invention, the infrared signal transmitted from the infrared generator
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12 provided in the transmitter 10 to the infrared light receiver 32 provided in the headphone 34
is frequency-modulated to carry two channels of audio. Therefore, the person wearing the
headphones 34 can listen to the audio on the high fidelity stereo.
[0012]
Furthermore, according to the present invention, by providing the characteristic adjustment
equalizer 16 in the transmitter 10, it is possible to obtain a sound having the same characteristic
as the naked ear characteristic when there is a sound source on the front.
[0013]
Furthermore, according to the present invention, by using the open head type headphone 34,
even if the headphone 34 is worn while wearing the hearing aid, it does not cause howling, and
also like a normal person who does not use the hearing aid. Not only the sound from the
headphone 34 but also the surrounding sound can be heard.
[0014]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a binaural type
cordless hearing aid according to the present invention will be described below with reference to
FIGS.
[0015]
As shown in FIG. 1, the binaural cordless hearing aid according to the present invention
comprises a transmitter 10 and a receiver 30, and such receiver 30 may be built in and attached
to a headphone 34 as shown, or a headphone It may be mounted close to 34.
[0016]
The transmitter 10 includes, for example, a microphone amplifier 18 to which two microphones
20A and 20A are connected, a stereo modulator 14 connected to the microphone amplifier 18
and an infrared generator 12 such as a light emitting diode connected to the stereo modulator
14. May be configured to include
[0017]
An audio signal picked up by the two microphones 20 A, 20 A is amplified by the microphone
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amplifier 18 and frequency-modulated by the stereo modulator 14.
The infrared generator 12 generates a stereo frequency modulated infrared signal having two
channels of binaural audio signals.
[0018]
The receiver 30 may be configured to include an infrared receiver 32 such as a phototransistor
that receives such an infrared signal, and a stereo demodulator that demodulates the signal from
such an infrared receiver 32.
[0019]
The stereo demodulator may have a known configuration, including, for example, an FM detector
and a matrix circuit.
[0020]
The right audio signal and the left audio signal output from the stereo demodulator are input to
the right speaker and the left speaker of the headphone, respectively.
[0021]
As shown in the figure, the directional microphone 20B may be connected to the microphone
amplifier 18 in order to improve the SN ratio of the collected audio signal.
[0022]
The headphones 34 will be described in detail later, but preferably, open-air stereo headphones
as shown in FIG. 4 are used.
[0023]
Next, a method of using the binaural type cordless hearing aid according to the present invention
will be described.
[0024]
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The headphones 34 are attached to a large number of deaf people in the playback sound field.
At this time, each deaf person wears a hearing aid adjusted to respond in response to their own
deafness characteristics.
Thus, the headphones 34 are worn over the hearing aid to cover it.
[0025]
Music or living sound is collected from the two microphones 20A, and an infrared ray having
such an audio signal is generated from the infrared generator 12.
When the reproduction sound field in which a person with a hearing loss exists is large like a
classroom, the infrared generator 12 may be installed in an appropriate number.
[0026]
The infrared signal generated by the infrared generator 12 is simultaneously reproduced by the
headphones 34 of a large number of deaf persons in the reproduction sound field.
[0027]
The headphones 34 can respectively adjust the volume but generate sound reproduced from the
same infrared signal.
Thus, the deaf person can listen to the same sound simultaneously while wearing his own
hearing aid.
[0028]
In the cordless hearing aid using infrared rays according to the conventional example, since the
receiver and the headphones are configured to have hearing aid characteristics corresponding to
each deaf person, no one can freely use the receiver and the headphones However, according to
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the binaural type cordless hearing aid device of the present invention, since the headphones can
be worn while wearing their own hearing aids, anyone can freely use the receiver and the
headphones 34, and furthermore, People other than the deaf can also be used.
[0029]
Furthermore, according to the binaural type cordless hearing aid device of the present invention,
the localization of the sound image of the person with hearing impairment is clarified by listening
to the sound in stereo, and the noise source and the sound source are spatially separated and
recognized. be able to.
[0030]
FIG. 2 shows another embodiment, and the transmitter 10 further has a characteristic adjustment
equalizer 16.
[0031]
In the case of using the binaural type cordless hearing aid according to the present invention,
since the deafness characteristic of each deaf person is corrected by the hearing aid, it is possible
to transmit an audio signal for reproducing a natural listening condition by means of an infrared
signal.
[0032]
The characteristic adjustment equalizer 16 has the same characteristic as that when the sound
source on the front is heard with the naked ear so that a natural listening state can be
reproduced by the headphones 34.
The simulation characteristics when the front sound source is heard by the naked ear are shown
in FIG. 3A, and the response of the characteristic adjustment equalizer 16 is shown in FIG. 3B.
[0033]
Since the binaural type cordless hearing aid according to the present invention is configured to
wear the headphones 34 while wearing the hearing aid, preferably, an open air type headphone
is used.
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[0034]
Sealed or semi-sealed headphones have the disadvantage that howling occurs when they are
worn over a hearing aid.
[0035]
The use of the open air type headphone not only can avoid such howling but also has the
advantage of being able to listen to the ambient sound and his own sound at the same time.
Therefore, in the deaf class, since it is possible to listen to another person's speech and to speak
while listening to their own voice, natural speech becomes possible.
[0036]
FIG. 4 shows an example of an open air type headphone.
The open air type headphone 34 has a case 50, an ear pad 52, a diaphragm 54, a magnet 56, a
braking member 58, and a voice coil 60.
The earpiece 52 has an annular shape, and a recess is formed on the inside thereof so that the
hearing aid can be accommodated.
[0037]
Although the embodiments of the present invention have been described in detail, those skilled in
the art will readily understand that the present invention is not limited to the above-described
embodiments and that various other configurations can be adopted without departing from the
scope of the present invention. It will be done.
[0038]
According to the present invention, there is an advantage that even a deaf person can listen to
music and voice in high fidelity stereo.
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[0039]
According to the present invention, in the binaural type cordless hearing aid using infrared rays,
there is an advantage that the sound can be reproduced with the same characteristics as the
naked ear characteristics.
[0040]
According to the present invention, there is an advantage in the binaural type cordless hearing
aid using infrared rays that a deaf person can listen to hi-fi sound from headphones while
wearing the hearing aid.
[0041]
According to the present invention, in the binaural type cordless hearing aid using infrared rays,
not only the sound from the headphones but also the surrounding sound and the own sound can
be simultaneously heard.
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