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:
Sep. 08, 2026
Filed:
Feb. 24, 2021
Ntt, Inc., Tokyo, JP;
Masahiro Fukui, Tokyo, JP;
Kazunori Kobayashi, Tokyo, JP;
Noriyoshi Kamado, Tokyo, JP;
Ryotaro Sato, Tokyo, JP;
NTT, Inc., Tokyo, JP;
Abstract
Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones. An acoustic system including: a directivity control device including at least one directivity control unit that generates a first processed acoustic signal from a first acoustic signal and generates a second processed acoustic signal from a second acoustic signal having an opposite phase to the first acoustic signal by executing predetermined signal processing; and a speaker system including at least one speaker unit pair including a positive speaker unit that emits a sound based on the first processed acoustic signal and a negative speaker unit that emits a sound based on the second processed acoustic signal, in which the signal processing executed by the directivity control unit is processing of causing a sound emitted from the positive speaker unit of the speaker unit pair and a sound emitted from the negative speaker unit of the speaker unit pair to be audible in an area to be made audible near the speaker unit pair and to be inaudible in an area to be made inaudible.