ACTIVE NOISE REDUCTION DEVICE AND MOBILE OBJECT DEVICE

To provide an active noise reduction device that can improve the degree of freedom in the frequency range in which noise can be reduced.SOLUTION: An active noise reduction device 10 includes: a plurality of first adaptive filters 11; a plurality of feedback filters 12; an addition unit 13 that adds...

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1. Verfasser:	UENO SHOTARO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES
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Zusammenfassung:	To provide an active noise reduction device that can improve the degree of freedom in the frequency range in which noise can be reduced.SOLUTION: An active noise reduction device 10 includes: a plurality of first adaptive filters 11; a plurality of feedback filters 12; an addition unit 13 that adds cancel signals respectively outputted by the plurality of first adaptive filters 11, and outputs a cancel signal obtained by addition; and a band elimination filter that is provided in at least one of a first path from each of the plurality of first adaptive filters 11 to a speaker 52 and a second path from a microphone 53 to each of the plurality of first adaptive filters 11.SELECTED DRAWING: Figure 6 【課題】騒音を低減することができる周波数範囲の自由度を向上することができる能動騒音低減装置を提供する。【解決手段】能動騒音低減装置１０は、複数の第１適応フィルタ１１と、複数の帰還フィルタ１２と、複数の第１適応フィルタ１１のそれぞれが出力するキャンセル信号を加算し、加算後のキャンセル信号を出力する加算部１３と、複数の第１適応フィルタ１１のそれぞれからスピーカ５２に至るまでの第１経路、及び、マイクロフォン５３から複数の第１適応フィルタ１１のそれぞれに至るまでの第２経路の少なくとも一方の経路に設けられたバンドエリミネーションフィルタとを備える。【選択図】図６