公开(公告)号：US12123766B2

公开(公告)日：2024-10-22

申请号：US17762462

申请日：2020-09-25

申请人： MITSUBISHI HEAVY INDUSTRIES, LTD.

发明人： Motoshi Takasu ,  Toshifumi Kudo ,  Yoshiyuki Hamaji ,  Takanori Kouou

IPC分类号： G01H3/00 ,  G01H3/08 ,  G10L19/02 ,  G10L25/18 ,  G10L25/21 ,  H04R3/00

CPC分类号： G01H3/08 ,  G10L19/0204 ,  G10L25/18 ,  G10L25/21 ,  H04R3/005 ,  H04R2410/01 ,  H04R2430/21

摘要： This signal processing device comprises: an acquisition unit for acquiring an acoustic signal; a measurement unit for measuring an acoustic level of the acoustic signal for every one of first frequency bands, which are a plurality of frequency bands of a preset first bandwidth; a calculation unit that, on the basis of the plurality of acoustic levels of the first frequency bands, identifies an acoustic feature quantity indicating the separation degree from normal acoustic levels of second frequency bands, which are a plurality of frequency bands of a second bandwidth that is wider than the first bandwidth; a first determination unit for determining whether the acoustic levels measured for every one of the first frequency bands are a first threshold value or greater; and a second determination unit for determining whether the acoustic feature quantity is a second threshold value or greater.