NOISE CANCEL SYSTEM

PURPOSE:To prevent a system from being enlarged in size and increased in manufacturing cost by silencing noise generated in a noise source by a noise canceling processing sections being fewer than the number of sensors. CONSTITUTION:Noise detecting sensors 101a-101c of n pieces (n>m) are provided...

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Bibliographische Detailangaben
1. Verfasser:	AKIYASU MASAICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BASIC ELECTRONIC CIRCUITRY BLASTING DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS LIGHTING LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS PUBLIC ADDRESS SYSTEMS RESONATORS SOUND-PRODUCING DEVICES STEAM ENGINES TRANSMISSION WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent a system from being enlarged in size and increased in manufacturing cost by silencing noise generated in a noise source by a noise canceling processing sections being fewer than the number of sensors. CONSTITUTION:Noise detecting sensors 101a-101c of n pieces (n>m) are provided to detect noise of m pieces of independent noise sources, n pieces of sensor output signals are inputted to conversion filters 102a-102b, m pieces of signals of non-correlation are generated from the conversion filters, m pieces of signals outputted from the conversion filters are respectively processed in adaptive signals as reference signals by m pieces of adaptive signal processing sections 103a-103b, a noise canceling signal in which output signals of m pieces of the adaptive signal processing sections are synthesized is inputted to a loudspeaker 107, and a canceling sound is outputted so that noise at a observing point is canceled.