PORTABLE LOUDSPEAKERS AND CONVERTIBLE PERSONAL AUDIO HEADPHONE/LOUDSPEAKERS

The invention provides, in some aspects, an audio headphone suitable for conversion to a loudspeaker. The device includes one or more earcups, each having a concavity that includes first and second volumetric regions and a wall that seals the regions from one another. Selon certains aspects, la prés...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	GUENTHER, GODEHARD, A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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