Amplifier Circuit – Hearing Amplifier Circuit Principle

Amplifier circuit-Hearing aid amplifier circuit principle

The role of the hearing aid is to amplify the sound signal. therefore,The essence of a hearing aid is an amplifier. The amplification of the sound signal by the hearing aid is done by an amplifying circuit. There are many classification methods for hearing aid amplification circuits.,But in most cases we divide them into linear amplification circuits and compression amplification circuits.

Linear amplification is the most basic form of amplification. Linear amplification refers to the equivalent magnification,That is, the output input difference is a constant within a certain range.(gain). Within a certain intensity range,Linear amplifier circuit has strong signal reduction ability,Is an ideal way to zoom in,Very suitable for patients with conductive deafness. But for patients with sensorineural deafness,In particular, patients with sputum sputum may not be suitable. the reason is, This type of patient has a strong vibration phenomenon,Although they can’t hear and hear badly when the output is small,-The output sound is slightly larger,They will feel”Deafening ear”. Can’t zoom in,Can’t help but limit,This sounds very contradictory. In fact, this is the main reason why people think that sensorineural hearing loss can not be used with hearing aids. This type of problem is now partially solved.:We can use methods that both amplify and limit excessive sound output.