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Diaphragms For Electromechanical Transducers
(AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
Abstract
A loudspeaker intended for sound reproduction, characterized in that the loudspeaker has two mobile coils to reproduce the different sounds coming from two channels, each of which is applied to each of the coils. (Machine-translation by Google Translate, not legally binding)
A method of recording sound oscillations on a tape and reducing the sound so registered. (Machine-translation by Google Translate, not legally binding)
Improvements in microphones, particularly for duplex installations with speakers and microphone (Machine-translation by Google Translate, not legally binding)