The present invention relates to an electro-acoustic transducer suitable for
applications within mobile communication equipment and hearing aids. The transducer
comprises two diaphragms positioned on opposite sides of a magnetic circuit having
two magnetic gaps. When used as a microphone the transducer is substantially insensitive
to vibrations, and when used as a speaker the transducer generates only very low
vibration levels. The magnetic circuit has a number of advantages compared to conventional
transducers with circular magnetic. The transducer can be made lightweight and
with very compact dimensions compared to conventional designs. In a preferred embodiment
the diaphragms are rectangular. The transducer may additionally be used as a vibration
generator for silent alarm signals.