Fundamental Considerations in the Design of a Voice-Switched Speakerphone
A. Busala · Bell System Technical Journal · 1960
The speakerphone offers the advantage of hands-free telephony by replacing the familiar handset with a separate microphone and loudspeaker. The convenience of such an arrangement justifies extensive efforts to overcome its acoustic and transmission limitations. Voice switching overcomes some of the limitations but adds problems of its own. This study analyzes these problems and outlines a method that has proved helpful in the design of a voice-switched speakerphone and the evaluation of its performance.