公开(公告)号：US20230154482A1

公开(公告)日：2023-05-18

申请号：US17973651

申请日：2022-10-26

Applicant: Alps Alpine Co., LTD.

Inventor： Nozomu SAITO ,  Keita TANNO

IPC: G10L21/0232 ,  H04R1/26

CPC classification number: G10L21/0232 ,  H04R1/26 ,  H04R2499/13 ,  G10L2021/02166

Abstract: A voice output from an i-th audio source apparatus is adjusted with a frequency transfer function Wii(f) set in an i-th noise reduction filter and is output from an i-th speaker. In the noise reduction filter, a frequency transfer function Wii(f) is set in which the sound is made smaller at frequencies where the gain of the frequency transfer function Cim(f) from the SPKi to a user tends to be relatively larger than the gain of the frequency transfer function Cii(f) from the SPKi to the user, and the sound is increased at frequencies where the gain of Cim(f) tends to be relatively smaller than the gain of Cii(f), where m is an integer excluding i from 1 to n.