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耳聋助听器实质上就是一个袖珍扩音器.它通过扩大日常生活中比较轻微的语声,来补助耳聋患者的听力损失,而且使音调悦耳,不致引起耳部痛感.十九世纪以来,曾出现电话式(炭精式)助听器、电子管式助听器等.近年来随着电子学的发展,出现了精致美观而且使用方便的各种晶体管耳聋助听器.它比电子管助听器用电省,比较耐用,而且更重要的是它的体积可以做得很小.本文主要介绍一般常用佩戴式晶体管耳聋助听器(图1)的基本原理及主要元件的结构和性能.
Deaf hearing aid is essentially a pocket-sized microphone that amplifies hearing loss in deaf patients by amplifying the slightest voice in daily life, and makes the tone sweet without causing ear pain. There have been calls since the nineteenth century In recent years, with the development of electronics, there have been a variety of deaf hearing aids that are exquisite and beautiful and easy to use, which are more durable than those of electronic hearing aids, and more It is important that its volume can be made very small.This article mainly introduces the basic principle and the structure and performance of the main components of the commonly used hearing loss hearing aid for wearable transistor (Figure 1).