ELECTROACOUSTIC CONVERSION SYSTEM

PROBLEM TO BE SOLVED: To give phone-like acoustic feeling and deep feeling by improving the acoustic characteristic (efficiency, flatness) of a speaker system with a usual sounding tube. SOLUTION: This system is provided with a closed side wall 32 including at least a parabolic curved face or an ell...

Ausführliche Beschreibung

Bibliographische Detailangaben

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