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:
Mar. 11, 2025
Filed:
Mar. 26, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Masahiro Fukui, Tokyo, JP;
Kazunori Kobayashi, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A sound system, for a user using a seat of an aircraft, an automobile, or the like, that reproduces sound inaudible to users around, without using earphones or headphones, is provided. A sound system for a user using a seat of an aircraft includes: a reproduction apparatus including an n-th reproduction unit (n=1, . . . , N) that outputs a (2n−1)-th sound signal that is a sound signal obtained based on a subject to be reproduced, and a 2n-th sound signal that is a sound signal with opposite phase to phase of the (2n−1)-th sound signal, N being an integer equal to or larger than one; and a speaker system including an n-th speaker unit pair (n=1, . . . , N) including a speaker unit that emits sound based on the (2n−1)-th sound signal (hereinafter, referred to as the positive speaker unit) and a speaker unit that emits sound based on the 2n-th sound signal (hereinafter, referred to as the negative speaker unit), the speaker system being installed at a place close to a head of the user using the seat.