CN206251331U - A kind of ear-level hearing aid - Google Patents

Abstract

The utility model relates to a behind-the-ear hearing aid, which comprises a power supply, a microphone, a signal processing circuit, an earpiece and a volume adjustment circuit. The microphone converts the sound wave signal in the environment into an electrical signal and transmits it to the signal processing circuit. Process and output the processed electrical signal to the earpiece for playback; the earpiece converts the electrical signal transmitted by the signal processing circuit into a sound wave signal and transmits it to the human ear. The utility model has the following advantages: (1) The integrated chip BU7150 with the functions of amplification and noise elimination is used to directly process and play the sound wave signal, without the need to set up a separate main control chip, the sound reproduction is clear, the effect is good, and it is more conducive to small volume design , saving cost; (2) and the integrated chip supports high and low frequency mode selection, which further improves the sound effect and improves the user experience; (3) the potentiometer cooperates with the knob-type volume adjustment method, which is not only easy to operate but also the volume increases and decreases evenly, reducing the need for Stimulation of the human ear.

Description

behind-the-ear hearing aid

technical field

The utility model relates to a hearing aid, in particular to a behind-the-ear hearing aid.

Background technique

Hearing aids are small amplifying devices used by the hearing-impaired to compensate for hearing loss, especially for the elderly. As they grow older, their hearing ability will also decline, and wearing hearing aids is a good way to solve hearing loss. s solution. Hearing aids are generally divided into four types according to their appearance and structure: behind the ear (BTE), in the ear (ITE), in the ear canal (ITC), and deep in the ear canal (CIC). Existing hearing aids have problems such as large size, poor noise filtering effect, and sound distortion.

Utility model content

The purpose of the utility model is to provide a hearing aid with small volume, low noise and good effect.

The technical scheme of the utility model is as follows: a behind-the-ear hearing aid, including a power supply, a microphone, a signal processing circuit, an earpiece and a volume adjustment circuit, the power supply is used to provide the electric energy required by the entire circuit; the microphone is used to receive The sound wave signal is converted into an electrical signal, and the electrical signal is transmitted to a signal processing circuit; the signal processing circuit adopts an audio processing chip U1, and the microphone, the volume adjustment circuit and the earpiece are respectively connected to the I/O port of the audio processing chip U1; It processes the electrical signal received by the microphone, and outputs the processed electrical signal to the earpiece for playback; the earpiece converts the electrical signal transmitted by the signal processing circuit into a sound wave signal, and transmits it to the human ear.

Preferably, the volume adjustment circuit includes a potentiometer R7, a capacitor C4 and a resistor R3, the sliding contact of the potentiometer R7 is connected to the capacitor C4, one end of the wiring is connected to the port of the audio processing chip U1, the other end of the wiring is connected to the resistor R3, and the resistor R3 is connected to the port of the audio processing chip U1. One end is connected to the I/O port of the audio processing chip U1, and the other end of C4 is also connected to the I/O port of the audio processing chip U1.

Preferably, the audio processing chip U1 is a BU7150 chip.

Preferably, the signal processing circuit is provided with a full-frequency/low-frequency mode switch, and the switch is connected to the I/O port of the audio processing chip U1.

Preferably, the volume adjustment circuit is adjusted by a knob.

The utility model has the following advantages: (1) The integrated chip BU7150 with amplification and noise elimination functions is used to directly process and play the sound wave signal, without the need to set up a separate main control chip, the sound reproduction is clear, the effect is good, and it is more conducive to small volume design , saving cost; (2) and the integrated chip supports high and low frequency mode selection, which further improves the sound effect and improves people's experience of use; (3) the potentiometer cooperates with the knob-type volume adjustment method, which is not only easy to operate, but also has a uniform volume increase and decrease, reducing the impact on Stimulation of the human ear.

Description of drawings

Fig. 1 is a schematic circuit diagram of the behind-the-ear hearing aid described in the present invention.

detailed description

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings.

The hearing aid described in the utility model is a small device for the hearing-impaired. Please refer to Fig. 1, which is a schematic circuit diagram of the BTE hearing aid described in the present invention; a BTE hearing aid includes a power supply 1, a microphone 2, a signal processing circuit 3, an earpiece 4 and a volume adjustment circuit 5, and the power supply 1 is used to provide The electric energy required by the whole circuit; the microphone 2 is used to receive the sound wave signal in the environment and convert it into an electrical signal, and transmit the electrical signal to the signal processing circuit 3; the signal processing circuit 3 adopts an audio processing chip U1, a microphone 2, a volume adjustment circuit 5 and The earpiece 4 is respectively connected to the I/O port of the audio processing chip U1; it processes the electrical signal received by the microphone 2, and outputs the processed electrical signal to the earpiece 4 for playback; the earpiece 4 transmits the electrical signal transmitted by the signal processing circuit 3 It is converted into a sound wave signal and transmitted to the human ear; the power supply 1 adopts a low-voltage button power supply, which has the advantages of high safety and stable performance, and is suitable for the power supply of the behind-the-ear hearing aid.

In order to reduce the impact of noise and improve the clarity of the output sound, the microphone 2 adopts a high-sensitivity microphone, which has the advantages of low noise and wide receiving range; the earpiece 4 adopts a moving iron horn, which is not easy to be distorted and has the characteristics of high sound density.

In this embodiment, the audio processing chip U1 adopts an audio amplifier chip of the model BU7150, which has the advantages of eliminating pop noise and protecting circuits.

In order to better adjust the volume output, the volume adjustment circuit includes a potentiometer R7, a capacitor C4 and a resistor R3, wherein the sliding contact of the potentiometer R7 is connected to the capacitor C4, one end of the wire is connected to the port of the audio processing chip U1, and the other end of the wire is connected to The other end of resistor R3 is connected to the I/O port of the audio processing chip U1, and the other end of C4 is also connected to the I/O port of the audio processing chip U1. The volume adjustment circuit 4 is adjusted by a knob, which is easy to operate. In this way, by adjusting the resistance value of the resistor, and then changing the current in the circuit, thereby controlling the volume of the earpiece 4, the user can adjust the volume according to his own hearing ability.

In order to meet the sound effects of different environments, the signal processing circuit 3 is provided with a full-frequency/low-frequency mode switch 6, which is connected to the I/O port of the audio processing chip U1, wherein the full-frequency mode keeps the high and low frequency sounds intact , The low frequency mode retains the low frequency and attenuates the high frequency to suit users' different listening environments.

The utility model has the following advantages: (1) The integrated chip BU7150 with amplification and noise elimination functions is used to directly process and play the sound wave signal, without the need to set up a separate main control chip, the sound reproduction is clear, the effect is good, and it is more conducive to small volume design , saving cost; (2) and the integrated chip supports high and low frequency mode selection, which further improves the sound effect and improves people's experience of use; (3) the potentiometer cooperates with the knob-type volume adjustment method, which is not only easy to operate, but also has a uniform volume increase and decrease, reducing the impact on Stimulation of the human ear.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. a kind of ear-level hearing aid, including power supply, microphone, signal processing circuit, receiver and volume control circuit, its feature It is,

The power supply is used to provide electric energy needed for whole circuit；

The acoustic signals that the microphone is used to receive in environment are converted to electric signal, and electric signal transmission is electric to signal transacting Road；

The signal processing circuit uses audio processing chip U1, and the microphone, volume control circuit and receiver are connected respectively In I/O mouthfuls of audio processing chip U1；It is processed the electric signal that microphone is received, and by the electric signal output after treatment Played to receiver；

The electric signal that signal processing circuit is transmitted is converted to acoustic signals by the receiver, and is transferred to human ear.

2. ear-level hearing aid according to claim 1, it is characterised in that volume control circuit includes potentiometer R7, electricity Hold C4 and resistance R3, potentiometer R7 sliding contacts are connected to electric capacity C4, and wiring one end is connected to the port of audio processing chip U1, The wiring other end accesses resistance R3, and the resistance R3 other ends access I/O mouthfuls of audio processing chip U1, and the C4 other ends also access audio I/O mouthfuls of process chip U1.

3. ear-level hearing aid according to claim 1, it is characterised in that the audio processing chip U1 uses BU7150 Chip.

4. ear-level hearing aid according to claim 1, it is characterised in that the signal processing circuit be provided with full range/ Low frequency mode switching switch, the switching switch is connected with I/O mouthfuls of audio processing chip U1.

5. ear-level hearing aid according to claim 1, it is characterised in that the volume control circuit is adjusted using knob Section.