Patent 7362878 was granted and assigned to Knowles (company) on April, 2008 by the United States Patent and Trademark Office.
A transducer suitable for use as a microphone or receiver in a hearing aid has a housing and a diaphragm disposed within the housing. A motor assembly is also disposed within the housing and operatively coupled to the diaphragm. The motor assembly includes a magnet assembly having a magnetic yoke forming a channel and a drive magnet disposed within the channel.