KR20050018241A - hearing aid for whole tone type difficulty in hearing and nervous sensing tone type difficulty in hearing - Google Patents

Abstract

PURPOSE: A hearing aid used for sound transmission hard hearing and nerve sensitive hard hearing is provided to perform linear amplification and nonlinear amplification of sound according to the control of a user. CONSTITUTION: The hearing aid comprises a mic(10) converting a voice signal into an electrical signal, and an amplification part(20) amplifying the electrical signal, and a speaker(30) outputting the amplified electrical signal as a voice signal. A low pass filter part(40) is connected between the mic and the amplification part, and is constituted with a condenser(C1) and a variable resistor(VR1), and filters a low frequency signal. A high pass filter(50) is connected between the amplification part and the speaker, and is constituted with a condenser(C4) and a variable resistor(VR2), and filters a high frequency signal. And a volume control(70) has a variable resistor(VR3) to control the amplitude of the amplified signal.

Description

Hearing aid for whole tone type difficulty in hearing and nervous sensing tone type difficulty in hearing}

TECHNICAL FIELD The present invention relates to a hearing aid combined with a total hearing loss and a nerve attenuating hearing loss. In particular, a hearing impaired hearing loss caused by damage to a negative physical conduction organ and a neurological hearing loss impaired by a negative biological conduction organ or two In the case of complex hearing loss, the present invention relates to a hearing aid combined with a total hearing loss and a hearing loss that can be used in combination.

In general, the human audible range is from 20Hz to 20KHz, but the conversational range is usually in the sonic band from 250HZ to 4000Hz. However, the high-frequency band of the hearing-sensing cells is located in the upper part of the auditory canal, and the neighboring auditory cells are observed histologically degenerate easily in the case of senile hearing loss or noise-induced hearing loss, so if the sound of the same gain It's easier to hear than other bands, and there's a risk of accelerating this degeneration if you're constantly exposed to high-pitched sounds.

Hearing loss can be divided into pre-neural hearing loss and nerve-affected hearing loss, which is a hearing loss from the outer ear to the middle ear, and a nerve-deaf hearing loss in the inner ear. Hearing aids used for omnic hearing loss are manufactured to compensate for hearing loss by linearly amplifying the sound, and hearing aids used for neuroacoustic hearing loss are designed to compensate for hearing loss by amplifying the sound nonlinearly.

That is, the hearing aid receives the external sound from the microphone and converts the air vibration sound of the speaker into the mechanical vibration of the three small bones (is bones) of the eardrum and the middle ear through the auricle and the ear canal by the auditory mechanism. It has a structure that transmits to the auditory nerve connected to the cerebrum through the cochlea of the inner ear, which constitutes the perceptual sound system.

However, as described above, the hearing aids used for the pre-neural hearing loss and the neuro-acoustic hearing loss are greatly different in the method of amplifying the sound. As a speaker of a conventional hearing aid manufactured only for one purpose there was a problem that the sound of a sufficient size is not transmitted to the sound level meter.

The present invention has been invented to solve the above problems, by making a hearing aid to enable linear amplification and non-linear amplification of the sound according to the user's control so that it can be used in combination in the case of temple speech deafness and nerve aural hearing loss It is an object of the present invention to provide a hearing aid and a hearing loss combined hearing loss for hearing.

The present invention for achieving such an object,

In the hearing aid having a microphone for electrical signal to the voice signal, an amplifier for amplifying the electrical signal input from the microphone and a speaker for converting the signal amplified by the amplification unit to output the audio signal,

A low frequency filter unit connected between the microphone and the amplifying unit and configured to have a condenser C1 and a variable resistor VR1 connected in parallel and to filter a low frequency signal;

A high frequency filter unit 40 connected between the amplifying unit and the speaker to connect the capacitor C4 and the variable resistor VR2 in series and for filtering the high frequency signal; And

It further includes a volume control configured with a variable resistor (VR3) for controlling the magnitude of the signal to be amplified by being connected to the amplifier.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram illustrating the structure of a general hearing aid, and FIG. 2 is a circuit diagram illustrating the structure and operation of the hearing aid according to the present invention.

As shown in FIG. 1, the hearing aid is amplified by a microphone 1 for electric signal input of an audio signal, an amplifier 2 for amplifying an electric signal input from the microphone 1, and an amplifier 2. And a speaker 3 for converting the electric signal into a voice signal.

The hearing aid according to the present invention, as shown in Figure 2, the condenser between the microphone 10 for the electrical signal input signal and the amplifier 20 for amplifying the electrical signal input from the microphone 10 And a low frequency filter unit 40 in which C1 and the variable resistor VR1 are connected in parallel. Between the amplifier 20 and the speaker 30 is provided with a high frequency filter unit 40 is formed by connecting the capacitor (C4) and the variable resistor (VR2) in series. The amplifier 20 is connected to a volume control 70 including a variable resistor VR3 for adjusting the amplitude of the signal to be amplified, and a variable resistor for adjusting the size of the output audio signal. A gain control 70 composed of VR4 is formed.

In addition, capacitors C2 and C3 for impedance correction are formed between the microphone 10 and the amplifier 20, and between the amplifier 20 and the speaker 30, respectively.

Combined hearing loss according to the present invention having a configuration such as hearing loss and nerve attenuation hearing loss combined with a low frequency filter 40 in the case of full-range hearing loss that is not easy to transmit the sound over the whole range of the sound, ie, hearing loss The variable resistors VR1 and VR2 of the high frequency filter 50 are turned off, and only the variable resistor VR3 of the volume control 70 connected to the amplifier 20 is adjusted to linearly adjust the signal input from the microphone 10. Amplify by hearing loss.

However, in the case of nerve-affected hearing loss in which a hearing loss occurs in the inner ear and the hearing loss occurs in the sound of some band frequencies, the control and amplification unit of the variable resistors VR1 and VR2 of the low frequency filter 40 and the high frequency filter 50 is deaf. By performing the adjustment of the variable resistor (VR3) of the volume control 70 connected to the (20) by performing a non-linear amplification of the signal input from the microphone 10 to perform the hearing loss compensation.

In the case of neurosensitive hearing loss, as shown in Equation 1 and Equation 2 below, by adjusting the variable resistors VR1 and VR2 of the low frequency filter 40 and the high frequency filter 50, the human is at a loudness of 110 dB, which is a loud sound in natural state By attenuating the S / N ratio to -50dB, nonlinear amplification that amplifies only a specific frequency band is performed.

<Equation 1>

<Equation 2>

Here, fx is the conversion point frequency Ro is the load resistance value, and thus, by adjusting the variable resistors VR1 and VR2 of the low frequency filter 40 and the high frequency filter 50, the value of the LC resonant frequency can be changed, thereby providing the microphone 10. NSA is performed by non-linear amplification that amplifies the signal input from a specific frequency band only.

In the case of mixed hearing loss in which both pre-neural hearing loss and nerve-induced hearing loss are simultaneously used, the volume control connected to the control and amplification unit 20 of the variable resistors VR1 and VR2 of the low frequency filter 40 and the high frequency filter 50 is performed. By performing the adjustment of the variable resistor VR3 of 70, the signal input from the microphone 10 is nonlinearly amplified to perform hearing loss compensation through linear and nonlinear fine adjustment.

Therefore, the hearing aid according to the present invention is compensated for the hearing loss even in the case of a mixed hearing loss in which a single hearing aid is a whole voice, a nerve attenuator or a mixed voice and a nerve audible.

As described above, the hearing aid combined with a hearing loss according to the present invention and a hearing loss combined with a hearing loss hearing aid according to the present invention by adjusting the hearing aid according to the type of hearing loss and the hearing loss and neurodeaf hearing loss by allowing the compensation of hearing loss convenience It is effective to promote.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto and may be improved or modified by those skilled in the art within the scope of the technical idea of the present invention.

1 is a circuit diagram for explaining the structure of a general hearing aid.

2 is a circuit diagram for explaining the structure and operation of the hearing aid according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: microphone 20: amplifier

30: speaker 40: low frequency filter unit

50: high frequency filter unit 70: volume control

80: gain control

Claims (2)

A microphone 10 for converting a voice signal into an electrical signal, an amplifier 20 for amplifying an electric signal input from the microphone 10, and a signal amplified by the amplifier 20 is converted into a voice signal and outputted. In the hearing aid provided with the speaker 30, A low frequency filter unit 40 connected between the microphone 10 and the amplifying unit 20 and configured to have a condenser C1 and a variable resistor VR1 connected in parallel and to filter a low frequency signal; A high frequency filter unit 40 connected between the amplifying unit 20 and the speaker 30 and configured to connect a capacitor C4 and a variable resistor VR2 in series and to filter a high frequency signal; And Combined with the amplification unit 20, the hearing aid and the hearing loss combined hearing aids, characterized in that it further comprises a volume control (70) consisting of a variable resistor (VR3) for adjusting the size of the signal to be amplified. 2. The capacitor of claim 1, wherein capacitors C2 and C3 for impedance correction are formed between the microphone 10 and the amplifier 20 and between the amplifier 20 and the speaker 30, respectively. Combined hearing loss and neuro-acoustic hearing loss, characterized in that the hearing aid.