The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2013
Filed:
Jul. 13, 2009
Tsuyoshi Maeda, Osaka, JP;
Masaaki Higashida, Osaka, JP;
Toshihiro Ezaki, Osaka, JP;
Yoshifumi Asao, Osaka, JP;
Hiroyuki Kano, Osaka, JP;
Tsuyoshi Maeda, Osaka, JP;
Masaaki Higashida, Osaka, JP;
Toshihiro Ezaki, Osaka, JP;
Yoshifumi Asao, Osaka, JP;
Hiroyuki Kano, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.