US 12,190,856 B2
Sound system
Masahiro Fukui, Tokyo (JP); and Kazunori Kobayashi, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/914,378
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014471
§ 371(c)(1), (2) Date Sep. 26, 2022,
PCT Pub. No. WO2021/199115, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0139520 A1, May 4, 2023
Int. Cl. G10K 11/178 (2006.01); H04R 1/02 (2006.01); H04R 1/10 (2006.01)
CPC G10K 11/17881 (2018.01) [H04R 1/025 (2013.01); H04R 1/1083 (2013.01); G10K 2210/1281 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A sound system comprising:
a control system that generates a control signal for canceling noise in a place close to a head of a user using a seat of an aircraft, from a signal of the noise (hereinafter, referred to as the noise signal); and
a noise-cancellation speaker system including M speaker units that emit sound based on the control signal (hereinafter, referred to as the noise-cancellation speaker units), M being an integer equal to or larger than one, the noise-cancellation speaker system being installed at the place close to the head of the user using the seat, wherein
assuming that the M noise-cancellation speaker units are a first noise-cancellation speaker unit, . . . , and an M-th noise-cancellation speaker unit, and
assuming that a direction in which the m-th noise-cancellation speaker unit faces the user is an m-th noise-cancellation user direction (m=1, . . . , M),
the m-th noise-cancellation speaker unit (m=1, . . . , M) is disposed such that sound emitted from the m-th noise-cancellation speaker unit in the m-th noise-cancellation user direction is canceled in a place other than the place close to the head of the user using the seat, due to bending around of sound emitted from the m-th noise-cancellation speaker unit in an opposite direction to the m-th noise-cancellation user direction,
wherein a member is attached to the m-th noise-cancellation speaker unit (m=1, . . . , M), the member being for lengthening a path of the sound bending around in the m-th noise-cancellation user direction, of the sound emitted from the m-th noise-cancellation speaker unit in the opposite direction to the m-th noise-cancellation user direction.