Patent ID: 7869610

Claim:
An acoustic transducer comprising: a housing for the transducer, the housing defining an interior and an exterior, an electrical terminal being disposed on the housing, the housing being configured without an audio port and disposed so as to create a close mechanical coupling with a skeletal structure of a user; a motor assembly disposed within the housing and coupled to the electrical terminal to receive an electrical signal representative of an audio signal to be transduced, the motor assembly including a first magnet, a second magnet, a coil, and an armature; such that the electrical signal is received by the coil and produces a current in the coil, the interaction of the current with the first magnet and the second magnet effective to produce a magnetic flux that moves at least a portion of the armature; a coupling assembly coupled to the motor assembly; an end mass assembly disposed within the housing and coupled to the coupling assembly; such that the movement of the armature is effective to move at least a portion of the coupling assembly and cause a vibration of the end mass assembly, the end mass assembly configured to transmit the vibration through the housing to the adjacent skeletal structure of the user via the close mechanical coupling.