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AssigneeNortel Networks Limited
InventorsLarry Edward Hawker, Andre John Van Schyndel, Christopher Michael Forrester
Estimating the term…
A wireless terminal for personal communication systems is provided with handsfree and handset receive modes of operation utilizing a single transducer. The transducer is mounted within a specially designed enclosure having front and back chambers separated by a partition. The partition contains strategically located internal vents and the front chamber contains strategically located acoustic ports for shaping the frequency response and providing good audio quality in each mode. The back chamber may also contain strategically located acoustic ports. Amplification and equalization circuitry may be employed to further adjust the amplifier gain and shape the frequency response for dual mode operation. The terminal may additionally be equipped with a proximity detector to assist in switching between operating modes of operation. The transducer may also be used to generate the alerting (ringing or buzzing) signal.
A communications device comprising:
A transducer enclosure for use in a communications device, comprising front and back chambers separated by a partition having at least one internal vent extending between the front and back chambers, the front chamber having at least one acoustic port communicating with the exterior of the enclosure, the enclosure further comprising a shutter for covering the at least one internal vent in a handsfree mode and uncovering the at least one internal vent in a handset mode.
Dependencies are inferred from the claim text.