Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Reexamination Certificate
2011-04-12
2011-04-12
Briney, III, Walter F (Department: 2614)
Telephonic communications
Substation or terminal circuitry
For loudspeaking terminal
C379S420030
Reexamination Certificate
active
07925004
ABSTRACT:
A speakerphone having improved echo cancellation and sound output includes at least one directional microphone having at least one axis of sensitivity and at least one zone of insensitivity, and a speaker disposed in the zone of insensitivity of the microphone to radiate sound away from the microphone and towards a reflective surface, such as a desktop or wall, against which the speakerphone is disposed. A baseplate disposed adjacent to the speaker outlet can combine with the housing of the phone to form a flaring, right-angled horn having an inlet coupled to the outlet of the speaker and an outlet terminating at a periphery of the housing. A wall-mounting embodiment incorporates a unidirectional microphone with an axis of sensitivity oriented perpendicular to the wall, and a desktop-mounting embodiment includes an array of at least two bi-directional microphones having respective axes of sensitivity oriented parallel to the desktop.
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Hodges Richard
Simmons Gordon S.
Briney III Walter F
Lawrence Donald C.
Plantronics Inc.
Rodriguez Michael D.
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