Cerumen barrier for custom in the ear type hearing intruments
Circuit arrangement for automatic gain control of hearing aids
Circuit for use in programmable hearing aids
Class D hearing aid amplifier
Class D hearing aid amplifier
Class D hearing aid amplifier with feedback
Class-d BICMOS hearing aid output amplifier
Coil assemblies
Coil assemblies
Combined microphone and magnetic induction pickup system
Communication device for transmitting audio information to a use
contact transducer assembly for hearing devices
Control circuit
Control circuit for controlling reproduced tone characteristics
Cosmetically disguised hearing aid
Cover for behind-the-ear type hearing aids and methods of making