Handset with a single transducer for handset and handsfree functionality
First Claim
1. A communications device comprising:
- a casing having a front face and a back face;
a transducer enclosure between the front face and the back face, comprising front and back chambers respectively adjacent the front and back faces, separated by a partition having at least one internal vent joining 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;
a transducer airtightly mounted in or coaxially with an opening in the partition for converting electrical signals into sound, the transducer directing sound into the front and back chambers.
5 Assignments
0 Petitions
Accused Products
Abstract
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.
130 Citations
29 Claims
-
1. A communications device comprising:
-
a casing having a front face and a back face; a transducer enclosure between the front face and the back face, comprising front and back chambers respectively adjacent the front and back faces, separated by a partition having at least one internal vent joining 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; a transducer airtightly mounted in or coaxially with an opening in the partition for converting electrical signals into sound, the transducer directing sound into the front and back chambers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
- 22. 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.
Specification