A UNIQUE DEVICE
NOVEL, LOUDSPEAKER UNIT, A striking novelty has just appeared on the New Zealand market in the form of a loudspeaker unit which, when ap. plied to a cuphoard, writing table, piano, door, window pane. or siinilar object converts any of these into a loud. speaker, The device is connected to a radio.sct in a similar manner to that of the ordinary loudspeaker. It may be described as a pocket loudspeaker, the vibrations from which are amplified by the object it rests upon. If used in conjunction with a portable receiving set it can be placed on an empty cigar Lox or similar receptacle which then becomes a veritable loudspeaker, The yarious objects may be tested for tone so that the one best adapted for the purpose can be used. Resonance and tonal quality can be extracted from most unexpected objects, and interest. ing experiments may be carried out in this direction.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19280120.2.9
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Radio Record, Volume I, Issue 27, 20 January 1928, Page 3
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154A UNIQUE DEVICE Radio Record, Volume I, Issue 27, 20 January 1928, Page 3
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