Patent ID: 11894013
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC G  H  B | IPC B  G  H

Claim 0:
1. An acoustic signal processing apparatus for installation in a vehicle, wherein at least a sound pickup position and a sound amplification position are assumed to be present in the vehicle,
the apparatus comprising:
processing circuitry configured to:
perform control such that:
(i) when an opening portion of the vehicle is closed by opening and closing means disposed at the opening portion, an acoustic signal based on a sound pickup signal obtained from a microphone that collects sound emitted from the sound pickup position is played back from a speaker at the sound amplification position; and
(ii) when the opening portion is open, the acoustic signal is not played back from the speaker to stop a sound amplification function in order to prevent propagating unintended sound.