Hearing aid with externally operable amplification mode selector

摘要

The audio amplifier is arranged on a PCB (14) set into the housing (10) and wired (20) to the battery compartment (18). The cover (22) of the housing carries two rocker witches (24, 26) for mode selection and vol. control respectively. Each switch lever (28) carries a bar magnet at its inner end for activating or deactivating a reed contact (44), and is spring-biased towards an end or middle position.An ear clip (12) is formed at one end of the housing.