Ingenious Transmitters
RADIO mechanism designed to alter the characteristics of broadcast speech, so that it becomes unintelligible to all listeners not equipped with the proper equipment has been invented by an American experimenter. By his plan the speech is broken up into three parts and transmitted on three channels. At the receiving end the components are combined in the correct rela-
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https://paperspast.natlib.govt.nz/periodicals/RADREC19320108.2.24
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Radio Record, Volume V, Issue 26, 8 January 1932, Page 8
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61Ingenious Transmitters Radio Record, Volume V, Issue 26, 8 January 1932, Page 8
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