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:
Apr. 21, 2026
Filed:
Apr. 05, 2021
Ntt, Inc., Tokyo, JP;
Ryotaro Sato, Tokyo, JP;
Noriyoshi Kamado, Tokyo, JP;
Kazunori Kobayashi, Tokyo, JP;
Masahiro Fukui, Tokyo, JP;
NTT, Inc, Tokyo, JP;
Abstract
A cancellation device according to one aspect of the invention is a cancellation device that cancels noise coming to a region in a vicinity of a loudspeaker, the cancellation device including at least two loudspeakersand one reference microphone, in which the cancellation device is configured such that an acoustic signal emitted in a sound emission direction of a same loudspeaker and an acoustic signal emitted in an opposite direction collide with each other, the at least two loudspeakersand the reference microphoneare arranged on a same plane, the at least two loudspeakersemit cancellation sound that cancels the noise in synchrony, and the plane is a plane including a boundary between a sound emission direction of the two loudspeakersand a direction opposite to a sound emission direction.