Hearing aid fitted to spectacles - has two channels with microphone and electroacoustic transducer fitted in each branch of frame of spectacles

摘要

The hearing-aid is for a partially deaf person and is incorporated in spectacles. It has two channels and has a reduced Larsen effect. The device is built into the frame of spectacles (1). Each branch (2, 3) of the spectacles (1) has a microphone (4, 5) fitted over an opening in the frame. Each frame branch (2, 3) has an amplifier and batteries. An electro-acoustic device is also fitted in each branch (2, 3) and is connected to the ear of the deaf person by flexible tubing (10, 11). An on-off switch with flap (12, 13) is also fitted to each branch. The frame of the spectacles (1) is made of plastics material. It has dimensions and cavities to incorporate the various devices of the hearing aid.