JP3431513B2 - Sound listening device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound listening apparatus for receiving a wireless signal modulated by an audio signal, extracting the audio signal from the wireless signal, and converting the audio signal into a magnetic wave signal by a loop coil.

[0002]

2. Description of the Related Art Conventionally, when a hearing aid wearer listens to a guide broadcast in a public facility such as a hospital or a bank, the hearing aid receives the noise of the surrounding voice and the echo of the guide broadcast itself mixed with the voice of the guide broadcast. It may be difficult to hear the required guide broadcasting sound through the ear.

In order to solve this problem, there is known a hearing aid voice magnetic field generator described in Design Registration Publication No. 805446. This is to detect a signal output, which is FM-modulated by an electric signal corresponding to the voice of the guide broadcasting (hereinafter referred to as a voice signal), with an FM receiver to extract the voice signal, and to output the voice signal to a loop loop coil of a neck type. It is supplied, converted into a magnetic wave signal by a loop coil, and this magnetic wave signal is detected by the telephone coil of the hearing aid.

If the telephone coil is selected by operating the input selector switch of the hearing aid, the output of the microphone is cut off, so that the sound signal emitted into the ear canal corresponds to the magnetic wave signal generated by the loop coil. Become. Therefore, the noise such as the surrounding voice and the reverberant sound of the guide broadcast itself do not enter.

[0005]

However, there is a problem that the audio signal from the hearing aid audio magnetic field generator cannot be heard unless a hearing aid equipped with a telephone coil is worn. Box-shaped, ear-hook type, ear-shaped and other types of hearing aids do not all have a telephone coil, but some have only an input terminal for inputting an external signal.

[0006] Further, a person with mild hearing loss does not always wear a hearing aid, and in this case, naturally, he / she cannot hear the audio signal from the audio magnetic field generator for hearing aid. In order to solve this problem, it is conceivable to temporarily rent out and use the hearing aid, but it is not realistic to prepare the rental hearing aid at a public facility because it is a cost burden.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a user-friendly sound listening apparatus capable of coping with various hearing impaired persons. To do.

[0008]

In order to solve the above problems, the invention according to claim 1 receives a wireless signal modulated by an audio signal by a receiver, extracts the audio signal, and hangs the audio signal. Output to the loop coil of the formula
By generating a magnetic wave signal from the coil,
Relay the audio signal to a hearing aid equipped with
To be able to hear the sound based on the sound signal with the hearing aid
In the sound hearing apparatus, the external output unit provided in the receiver, the external input terminal by connecting the hearing aid with the external output device and the external input terminal by connecting cord
The audio signal is supplied to a hearing aid provided .

According to a second aspect of the present invention, in the sound listening apparatus according to the first aspect, the receiver has gain adjusting means for adjusting the level of the audio signal, and the output of the gain adjusting means is the external output. Means outside through the connecting cord
It is intended to be supplied to a hearing aid having a partial input terminal .

[0010] The invention according to claim 3, extracts the audio signal received wireless signal modulated by the audio signal at the receiver, leaving the audio signal to the loop coils of the neck formula
Force to generate a magnetic wave signal from this loop coil
To send the audio signal to a hearing aid equipped with a telephone coil.
Continuously transmit and listen to the sound based on the sound signal with the hearing aid.
In a sound listening device capable of being picked up, a gain adjusting means for adjusting the level of the audio signal to the receiver and a contact switching type receptacle capable of performing electroacoustic conversion of the output of the gain adjusting means with an earphone for listening. It is equipped with.

According to a fourth aspect of the present invention, in the sound listening apparatus according to the first, second or third aspect, the receiver is attached to a part of the loop coil.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of the sound listening apparatus according to the present invention viewed from the front side, FIG. 2 is a perspective view of the sound listening apparatus according to the present invention viewed from the back side, and FIG. 3 is a sound listening according to the present invention. It is a block diagram of an apparatus.

As shown in FIG. 1, the sound listening apparatus according to the present invention includes an infrared receiver 1, a neck loop loop coil 2, an earphone 3 detachable from the infrared receiver 1, and an ear receiver 3 as shown in FIG. The infrared receiver 1 is provided with a detachable connection cord 9.

The infrared receiver 1 is fixed on the circumference of the loop coil 2. The infrared receiver 1 receives an infrared carrier wave modulated by an audio signal output from an infrared transmitter (not shown), detects this carrier wave, and outputs an audio signal to the loop coil 2. The loop coil 2 generates a magnetic field according to the level of the audio signal around the loop coil 2. The earphone 3 performs electroacoustic conversion on the audio signal output from the infrared receiver 1. The connection cord 9 is for outputting the audio signal output from the infrared receiver 1 to the outside.

The infrared transmitter emits an infrared ray (main carrier wave) whose brightness is modulated by a sub carrier wave which is FM-modulated by an audio signal. The modulation method of the infrared carrier wave is a provisional standard (EIAJ CPX-
1205) This is based on the infrared spatial analog voice transmission system. The peak wavelength of the infrared carrier wave is 800-90
It is 0 nm and the subcarrier frequency is 2.3 MHz.

As shown in FIG. 2, the infrared receiver 1 has a flat box-like shape made of a synthetic resin member. The infrared ray receiving section 1a is for taking in infrared rays transmitted by the infrared ray transmitter into an internal light receiving element (not shown).
In addition, 1b is a gain adjusting knob, Sw is a power switch, 7
Is an earphone terminal.

The loop coil 2 is made by passing a conductive wire through a flexible tubular polymer member formed in an annular shape,
A current based on a voice signal output from the infrared receiver 1 is made to flow through this conductor. When a current based on the output of the infrared receiver 1 flows, the loop coil 2 generates a magnetic field according to this current.

The earphone 3 is an open type earphone having a cord having a plug that fits the earphone terminal 7 of the infrared receiver 1 at one end. The open type earphone is a dynamic type earphone that allows good ventilation between the inside and the outside of the ear canal when worn (for example, Sony MDR
-E837MM). Since this earphone does not seal the external auditory meatus, it has a feature that it can be worn comfortably for a long time.

As shown in FIG. 3, the infrared receiver 1 includes an infrared receiver 4, a gain adjuster 5, an amplifier 6, an earphone terminal 7 and the like. The infrared receiver 4 receives the infrared carrier radiated from the infrared transmitter, detects the infrared carrier, extracts an audio signal, and outputs it.

The gain adjuster 5 gain-adjusts the output of the infrared receiver 4 and outputs it to the amplifier 6 in the subsequent stage. The gain adjustment is
As shown in FIG. 2, by rotating the output adjusting knob 1b arranged on the upper surface of the infrared receiver 1, the output adjusting knob 1b is rotated.
This is performed by changing the resistance of a variable resistor (not shown) that is linked to.

The amplifier 6 has an appropriate amplification degree and has an output impedance for efficiently sending a signal to the loop coil 2 having a low input impedance. The earphone terminal 7 is a contact switching type receptacle, and the earphone 3
When the plug is inserted into this, the connection to the loop coil 2 is cut off, and the output of the amplifier 6 is supplied only to the earphone 3.

The operation of the sound listening apparatus according to the present invention will be described below. In this sound listening apparatus, since the infrared receiver 1 is provided in a part of the loop coil 2 which can be hung on the neck, the infrared receiver 1a of the infrared receiver 1 faces the front of the chest and the loop coil 2 is necked. The entire device can be worn simply by hanging it on. Therefore, even an old person who is not accustomed to handling such a device can easily wear it, which is convenient.

In this sound listening apparatus, as shown in FIG. 2, the infrared receiver 1 is provided with an external output terminal 8 and one end of the connection cord 9 is connected to the external output terminal 8. By inserting the plug 9a at the other end into the external input terminal of the hearing aid 10, it is possible to emit a sound from the earphone of the hearing aid 10 according to the sound signal received by the infrared receiver 1.

Further, since the output of the gain adjuster 5 is connected to the external output terminal 8, the volume of the sound emitted can be adjusted by rotating the gain adjusting knob 1b.
The volume of the sound can be adjusted by operating the volume adjuster of the hearing aid 10, but it is convenient and easy to operate the gain adjusting knob 1b on the upper part of the infrared receiver 1 located at the chest. .

Since this sound listening apparatus is provided with the gain adjuster 5 for adjusting the level of the audio signal in the infrared receiver 1 and the earphone 3 for electroacoustic conversion of the output of the gain adjuster 5, the hearing aid is worn. People with hearing loss can also use it as a temporary hearing aid.

In the above embodiment, the case where the infrared signal is used as the wireless signal has been described, but the present invention is not limited to this, and a radio signal such as an FM radio wave may be used.

Further, in the above embodiment, the case where the gain adjusting knob 1b is provided on the upper part of the infrared receiver 1 has been described, but the point is that the position of the gain adjusting knob 1b is set because it is only necessary to easily adjust it. It may be another place.

[0028]

As described above, according to the invention according to claim 1, in addition to the neck loop type loop coil for converting the voice signal into the magnetic field in the wireless receiver, the voice signal is supplied to the external hearing aid. Since the external output means is provided, the audio signal can be output to both the hearing aid having the telephone coil and the hearing aid having the external input terminal.

According to the invention of claim 2, in the invention of claim 1, the receiver has gain adjusting means for adjusting the level of the audio signal, and the external output means outputs the output of this gain adjusting means to the hearing aid. Since the audio signal is not supplied at the desired level, the gain adjusting means provided in the receiver can be operated to adjust the audio signal to the desired value. As a result, the operations are unified and the handling becomes easy.

According to the third aspect of the present invention, in addition to the loop coil of the hanging type for converting the voice signal received by the wireless receiver into the magnetic field, the gain adjusting means for adjusting the level of the voice signal and the gain adjusting means. Receptor of contact switching type that can output the output of means by electro-acoustic conversion with earphone
Since a loop is provided, the plug of the earphone can be
If inserted into the septum, it is convenient because even a hearing-impaired person who does not have a hearing aid can temporarily use it as a hearing aid.

According to the invention of claim 4, claim 1,
In the invention according to 2 or 3, since the receiver is attached to a part of the loop coil, it is convenient because the whole device can be worn by a simple operation of hanging the loop coil around the neck.

[Brief description of drawings]

FIG. 1 is a perspective view of a sound listening apparatus according to the present invention viewed from the front side.

FIG. 2 is a perspective view of the sound listening device according to the present invention viewed from the back side.

FIG. 3 is a block diagram of a sound listening apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Infrared receiver, 1a ... Infrared receiving part, 1b ... Gain adjustment knob, 2 ... Neck loop coil, 3 ... Earphone,
4 ... Infrared receiver, 5 ... Gain adjuster, 6 ... Amplifier, 7 ...
Earphone terminal, 8 ... External output terminal, 9 ... Connection cord, 9
a ... plug, 10 ... hearing aid.

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Claims (4)

(57) [Claims] 1. A wireless signal modulated by an audio signal is received by a receiver, the audio signal is extracted, and the audio signal is output to a neck loop loop coil to output the loop coil.
By generating a magnetic wave signal from the
The voice signal is relayed and transmitted to the hearing aid provided.
In a sound listening device capable of listening to a voice based on a signal with the hearing aid, the receiver is provided with external output means,
A sound hearing device characterized in that the audio signal is supplied to the hearing aid having the external input terminal by connecting the external output means and the hearing aid having the external input terminal with a connection cord. 2. The sound listening apparatus according to claim 1, wherein the receiver has gain adjusting means for adjusting the level of the audio signal, and the output of the gain adjusting means is output by the external output means by the connection cord. A sound listening apparatus which supplies the sound to a hearing aid having the external input terminal via the sound input device. 3. A wireless signal modulated by an audio signal is received by a receiver, the audio signal is extracted, and the audio signal is output to a neck loop type loop coil to output the loop coil.
By generating a magnetic wave signal from the
The voice signal is relayed and transmitted to the hearing aid provided.
In a sound listening apparatus capable of listening to a voice based on a signal with the hearing aid, a gain adjusting means for adjusting the level of the audio signal to the receiver and an output of the gain adjusting means are electroacoustically converted and listened to. A sound listening device comprising a contact-switching type receptacle that is capable of operating. 4. The sound listening apparatus according to claim 1, 2 or 3, wherein the receiver is attached to a part of the loop coil.