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:
Jan. 27, 2026
Filed:
Nov. 06, 2020
Ntt, Inc., Tokyo, JP;
NTT, Inc., Tokyo, JP;
Abstract
A sound that cannot be heard by surrounding users is reproduced. A reproduction device () includes an n-th reproduction unit that outputs a 2n−1th acoustic signal (n=1, . . . , N) that is an acoustic signal obtained on the basis of a reproduction target and a 2n-th acoustic signal that is an acoustic signal having a phase opposite to that of the 2n−1th acoustic signal. A speaker system () includes at least two or more sets of an n-th speaker unit pair () including a positive speaker unit () that emits a 2n−1th acoustic signal-based sound and a negative speaker unit () that emits a 2n-th acoustic signal-based sound, the n-th speaker unit pair being installed at a position close to a user's head.