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:
Feb. 02, 2021
Filed:
Feb. 20, 2018
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Tatsuhiko Goto, Kawasaki Kanagawa, JP;
Akihiko Enamito, Kawasaki Kanagawa, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G10K 11/178 (2006.01); B64C 27/46 (2006.01); B64C 27/00 (2006.01); B64C 27/72 (2006.01); B64C 39/02 (2006.01); B64C 11/00 (2006.01);
U.S. Cl.
CPC ...
G10K 11/178 (2013.01); B64C 27/001 (2013.01); B64C 27/463 (2013.01); B64C 2027/7266 (2013.01); G10K 2210/1281 (2013.01);
Abstract
According to one embodiment, a noise reduction device includes speakers, microphones, and a processing circuit. The speakers are arranged around a rotor and emit control sound based on control signals. The microphones are arranged around the rotor and convert the control sound and noise emitted by the rotor into microphone signals. The processing circuit generates the control signals for reducing acoustic power in positions of the microphones, based on the microphone signals, rotation speed of the rotor, and a phase of noise that reaches the microphones from the rotor.