SELF-POWERED LOUDSPEAKER FOR SOUND MASKING

A sound masking system includes a self-amplified loudspeaker emitter unit, with a driver and enlarged ported enclosure, sufficient to provide a frequency range down to a low frequency, such as about 125 Hz. To deliver the power, the power distribution architecture includes audio power amplifiers in...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	COOK, Gordon, V, NOLLMAN, Mitchell
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY JAMMING OF COMMUNICATION LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS SECRET COMMUNICATION
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