HEARING AID AND METHOD OF CONTROLLING VOLUME OF HEARING AID

摘要

A hearing aid (101) is provided with: a microphone (121) which converts sound into electrical signals; a processing unit (105) which is provided inside a main case (102); a first volume adjustment unit (104) which comprises a variable resistor; and a receiver (123) which converts electrical signals into sound. The processing unit (105) comprises: an amplification unit (135) which amplifies electrical signals from the microphone (121); a second volume adjustment unit (105b) which sets the degree of amplification of the amplification unit (135), based on the resistance value of the variable resistor; and a control unit (130) which controls the second volume adjustment unit (105b) and amplification unit (135). The control unit (130) detects the resistance value of the variable resistor, judges whether the resistance value has exceeded a predetermined threshold, acquires a predetermined value for the degree of amplification of the amplification unit (135) when the resistance value has been judged to exceed the predetermined threshold, and sets the degree of amplification of the amplification unit (135) to the same predetermined value.