Use of handset microphone to enhance speakerphone loudspeaker performance
View Patent ↗A speakerphone incorporates a portion defining a loudspeaker cavity, the cavity containing a loudspeaker. The speakerphone also includes a handset with an internal microphone in the handset. The speakerphone has a housing adapted to receive the handset, and when it is thus received, the handset microphone is acoustically coupled to the loudspeaker cavity, allowing the handset microphone signal to be used to control feed-back or feed-forward algorithms that enhance the performance of the speakerphone.
1. In a speakerphone having a portion defining a loudspeaker cavity
containing a loudspeaker, the speakerphone including a handset having an internal microphone, said portion defining means for receiving the handset, the improvement comprising:
detecting when said handset is received within said portion of the speakerphone,
acoustically coupling the handset microphone to said loudspeaker cavity, and using the resulting handset microphone signal only upon detection of such handset being received within said portion of the speakerphone to control feed-back or feed-forward algorithms that enhance the performance of the speakerphone.
2. In a speakerphone having a portion defining a loudspeaker cavity containing a loudspeaker, the speakerphone including a handset with a handset cavity enclosing an internal microphone, said portion defining registry means for receiving the handset, the improvement comprising:
coupling means for acoustically coupling the microphone to said loudspeaker cavity whenever the handset is received by said registry means,
and a hookswitch for detecting when said handset is received within said registry means and in response, enabling use of the resulting handset microphone signal to control feed-back or feed-forward algorithms that enhance the performance of the speakerphone.
3. The improvement claimed in claim 2 , in which said loudspeaker cavity is defined at least in part by a wall, and in which said coupling means comprises an opening through said wall which is aligned with said internal microphone when the handset is received by said registry means.
4. The improvement claimed in claim 3 , in which the coupling means further comprises an elastomeric grommet dressing the hole, the grommet extending sufficiently far from the wall to contact the handset when the latter is received by said registry means, thus dampening handset movement and minimizing the risk that use of the loudspeaker will cause the handset to rattle.
5. A speakerphone comprising:
a portion defining a loudspeaker cavity,
a loudspeaker within said cavity,
a handset,
an internal microphone in the handset,
means on said portion for receiving the handset,
coupling means for acoustically coupling the handset microphone to said loudspeaker cavity, and a hookswitch for detecting when said handset is received within said portion of the speakerphone, and in response, enabling use of the resulting handset microphone signal to control feed-back or feed-forward algorithms that enhance the performance of the speakerphone.
6. The speakerphone claimed in claim 5 , in which the handset defines a handset cavity containing said handset microphone.
7. The speakerphone claimed in claim 5 , in which said loudspeaker cavity is defined at least in part by a wall, and in which said coupling means comprises an opening through said wall which is aligned with said internal microphone when the handset is received by said registry means.
8. The speakerphone claimed in claim 7 , in which the coupling means further comprises an elastomeric grommet dressing the hole, the grommet extending sufficiently far from the wall to contact the handset when the latter is received by said registry means, thus dampening handset movement and minimizing the risk that use of the loudspeaker will cause the handset to rattle.
9. For a speakerphone having a portion defining a loudspeaker cavity
containing a loudspeaker, the speakerphone including a handset having an internal microphone, said portion defining receiving means for receiving the handset, a method of exerting control over at least one aspect of the circuitry of the speakerphone, comprising acoustically coupling the microphone to said loudspeaker cavity whenever the handset is received by the receiving means, detecting when said handset is received by the receiving means and in response, using the resultant microphone signal to exert the control.
10. For use with a speakerphone having a portion defining a loudspeaker cavity containing a loudspeaker, the speakerphone including a handset with a handset cavity enclosing an internal microphone, said portion of the speakerphone defining receiving means for receiving the handset:
a method of controlling at least one aspect of the circuitry of the speakerphone, comprising acoustically coupling the microphone to said loudspeaker cavity whenever the handset is received by the receiving means, detecting when said handset is received by the receiving means and in response, using the resultant microphone signal to control feed-back or feed-forward algorithms that enhance the performance of the speakerphone.
11. The method claimed in claim 9 , in which said loudspeaker cavity is defined at least in part by a wall, and in which said coupling comprises aligning an opening through said wall with said internal microphone when the handset is received by said receiving means.
12. The method claimed in claim 11 , in which the coupling means further comprises an elastomeric grommet dressing the opening, the grommet extending sufficiently far from the wall to contact the handset when the handset is received by said receiving means, thus dampening handset movement and minimizing the risk that use of the loudspeaker will cause the handset to rattle.