The present invention relates to a surface mountable acoustic transducer system, comprising one or more transducers, a processing circuit electrically connected to the one or more transducers, and contact points arranged on an exterior surface part of the transducer system. The contact points are adapted...http://www.google.com.au/patents/US7221767?utm_source=gb-gplus-sharePatent US7221767 - Surface mountable transducer system
