Loudspeaker e.g. cone loudspeaker, unit for e.g. hands free set, has housing, whose dimensions, dimensions and position of opening are selected so that negative interference of acoustic signals is formed transverse to normal of loudspeaker

The loudspeaker unit has a flat loudspeaker (1) serving as an active element, which produces opposite phase acoustic signals (5, 6) during operation at its front and rear sides. The loudspeaker is fastened at a housing such that the housing has an opening by which the acoustic signals enter into an...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	LINHARD, KLAUS
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PERFORMING OPERATIONS PUBLIC ADDRESS SYSTEMS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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