<p>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. The magnetic yoke has a saturation inductance greater than 1.5 T and the drive magnet an energy density greater than 72 kJ/m3 and a coercivity greater than 140 kA/m.</p>
