A hearing improvement device using a multi-coil coupling system and methods for operating such a device are disclosed. An embodiment of the present invention may use an array microphone to provide highly directional reception. The received audio signal may be filtered, amplified, and converted into a...http://www.google.es/patents/US7099486?utm_source=gb-gplus-sharePatente US7099486 - Multi-coil coupling system for hearing aid applications
Multi-coil coupling system for hearing aid applications
