6 hearing aids main parts

Hearing aids come in many names, but all electronic hearing aids work the same way. Any hearing aid includes 6 basic structures.

1. A microphone (microphone or microphone) receives sound and converts it into radio waves, which translates sound energy into electrical energy.

2. Amplifier signal

3． Headphones (receivers) convert electrical signals into acoustic signals (that is, convert electrical energy into acoustic energy).

4． Ear molds (ear plugs) are placed in the external ear canal.

5． Volume control switch

6. Power Dry battery for amplifier.

In addition to the above 6 components of hearing aids, most models of hearing aids also have 3 accessories, or 3 additional circuits (tone control, induction coil, output limit control). Modern electronic hearing aids are amplifiers whose function is to increase the intensity of sound energy and introduce it into the ears as undistorted as possible. Because the sound energy of sound cannot be directly amplified, it is necessary to convert it into electrical signals, and then convert it into sound energy after amplification. The input transducer is composed of microphone (microphone or microphone), magnetic induction coil and other parts. Its role is to convert the input sound energy into electrical energy and transfer it to the amplifier. The amplifier amplifies the input electrical signal before transmitting it to the output transducer. The output transducer is composed of earphones or bone conduction vibrators, and its function is to convert the amplified signal from electrical energy to sound or kinetic energy output. The power supply is an indispensable part to supply the working energy of the hearing aid. In addition, it is also equipped with peak clipping (PC) or automatic gain control (AGC) devices to meet the needs of patients with various levels of deafness.