公开(公告)号：US20190259370A1

公开(公告)日：2019-08-22

申请号：US15901119

申请日：2018-02-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro YAMAGUCHI ,  Toshihiro EZAKI

IPC: G10K11/178 ,  H04R1/02

Abstract: A noise reduction device is connectable to a plurality of sound acquisition devices and a plurality of control sound output devices for reducing noises in a given space where seats are arranged and a sound field can be formed. The device includes a sound receiver, a processor, a control sound transmitter. The sound receiver receives a sound signal from at least two of the plurality of sound acquisition devices. The processor detects a state change of the sound field, and generates a control sound signal for reducing noise with respect to the sound signal. The control sound transmitter outputs the control sound signal to each of control sound output devices. The processor acquires, for example, seat information for specifying the reclining state of a seat. The processor controls the generation of the control sound signal based on the change of state of the sound field including the seat information.

公开(公告)号：US20190281398A1

公开(公告)日：2019-09-12

申请号：US16297907

申请日：2019-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro YAMAGUCHI ,  Toshihiro EZAKI ,  Kenichi KUBOTA ,  Masaru MATSUOKA ,  Yuji SUZUKI ,  Junji ARAKI ,  Shinichi TAKAYAMA

IPC: H04R29/00 ,  G10K11/16

Abstract: In a noise reduction device that generates and outputs a control sound signal for reducing noise, an internal loop control unit controls an internal loop in which a pre-output control sound signal that is acquired from a control sound output unit before output to a speaker is input to a sound receiver. A measurement unit measures an input level of a microphone sound signal and an input level of the pre-output control sound signal that has been input to the sound receiver in the internal loop. A fault detector uses the input level of the microphone sound signal and the input level of the pre-output control sound signal measured by the measurement unit to detect a fault in any one of the microphone, the sound receiver, the speaker, and the control sound output unit. A transmitter sends a result of fault detection performed by the fault detector to a management device.