Failure Diagnosing Method, Noise Measuring Device, And Failure Diagnosing System

A time at which a failure of a noise level meter has occurred is accurately determined. The present invention relates to a noise measuring device including a noise level meter having a main microphone capable of measuring noise, and a sub microphone capable of measuring noise at the same time as the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Sugaya, Shigeki, Ohashi, Shinji, Kohashi, Osamu, Tadahira, Yoshio, Fujita, Etsushi, Mizuno, Takahiro, Kawagoe, Hosei, Suido, Shozo
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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