Title :
A speakerphone system for large conference rooms
Author :
Huggler, Luther R.
Author_Institution :
Bell Telephone Company of Pennsylvania, Pittsburgh, Pa.
fDate :
7/1/1961 12:00:00 AM
Abstract :
Executives of various large corporations, for more than 20 years, continued to request some type of universal hands-free telephone service for their sizable conference rooms. Their objective was to be able to hold important consultations between conferees within such rooms and an absent person or persons located at some distant place but accessible to the conference by telephone connections.
Keywords :
Gain control; Microphones; Noise; Propagation losses; Speech; Switches; Voltage control;
Journal_Title :
American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the
DOI :
10.1109/TCE.1961.6373108