Invention Grant
- Patent Title: Active noise reduction device, instrument using same, and active noise reduction method
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Application No.: US14762482Application Date: 2014-01-21
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Publication No.: US09646596B2Publication Date: 2017-05-09
- Inventor: Mitsuhiro Tani , Mitsuru Kaitou , Toshiyuki Funayama
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2013-012832 20130128
- International Application: PCT/JP2014/000269 WO 20140121
- International Announcement: WO2014/115533 WO 20140731
- Main IPC: G10K11/16
- IPC: G10K11/16 ; G10K11/175 ; G10K11/178
Abstract:
In an active noise reduction device, in order to solve this problem, a control block determines a level of a reference signal detected by a level detection unit. If determining that the level of the reference signal is small, the control block decreases a level of a cancel signal. This operation suppresses generation of an abnormal sound even if a level of a noise is small.
Public/Granted literature
- US20150356965A1 ACTIVE NOISE REDUCTION DEVICE, INSTRUMENT USING SAME, AND ACTIVE NOISE REDUCTION METHOD Public/Granted day:2015-12-10
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