There are many names of hearing aids, but the working principle of all electronic hearing aids is the same. Any hearing aid includes 6 basic structures.
1. A microphone (microphone or microphone) receives sound and converts it into radio wave form, that is, converts sound energy into electrical energy.
2. Amplifier amplifies electrical signals (transistor amplification circuit)
3. Headphones (receivers) convert electrical signals into acoustic signals (that is, convert electrical energy into acoustic energy).
4. Ear molds (earplugs) are inserted into the external auditory canal.
5. Volume control switch
6. Dry battery used to power the amplifier.
In addition to the above 6 components of the hearing aid, most models of hearing aids also have 3 accessories, or 3 additional circuits (tone control, induction coil, output limit control) .A modern electronic hearing aid is an amplifier. Its function is to increase the intensity of sound energy and transmit it into the ear as undistorted as possible. Since the sound energy of the sound cannot be directly amplified, it is necessary to convert it into an electrical signal, amplify it, and then convert it. It is sound energy. The input transducer is composed of a microphone (microphone or microphone), a magnetic coil and other parts. Its function is to convert the input sound energy into electrical energy and transmit it to the amplifier. The amplifier amplifies the input electrical signal and then transmits it to the output transducer. Transducer. The output transducer is composed of earphones or bone conduction vibrators. Its function is to convert the amplified signal from electrical energy into sound energy or kinetic energy for output. The power supply is an indispensable part of supplying the working energy of the hearing aid. In addition, it is equipped with a cutter. Peak (PC) or automatic gain control (AGC) device to suit the needs of patients with various degrees of deafness.
Modern electronic hearing aids are amplifiers whose function is to increase the intensity of sound energy and minimize the It is transmitted into the ear with distortion. Since the sound energy of the sound cannot be directly amplified, it is necessary to convert it into an electrical signal, amplify it, and then convert it into sound energy. The input transducer consists of a microphone (microphone or microphone), a magnetic induction coil, etc. It is composed of several parts. Its function is to convert the input sound energy into electrical energy and transmit it to the amplifier. The amplifier amplifies the input electrical signal and then transmits it to the output transducer. The output transducer is composed of headphones or bone conduction vibrators, and its function is to The amplified signal is converted from electrical energy into sound energy or kinetic energy for output. The power supply is an indispensable part of supplying the working energy of the hearing aid. In addition, it is also equipped with a peak clipping (PC) or automatic gain control (AGC) device to suit various degrees of deafness. Patient needs.