公开(公告)号：US20240357287A1

公开(公告)日：2024-10-24

申请号：US18761633

申请日：2024-07-02

Applicant: DENSO CORPORATION

Inventor： Tetsuto KAWAI ,  Kazuaki MAWATARI

IPC: H04R3/04 ,  G01M99/00

CPC classification number: H04R3/04 ,  G01M99/005 ,  H04R2430/01

Abstract: A sound conversion device includes a sound acquisition circuit that acquires the operation sound including abnormal sound as a sound pressure time signal that is a signal indicating a change in sound pressure intensity over time, a signal conversion circuit that converts a signal corresponding to the sound pressure time signal into a frequency characteristic indicating an intensity of sound pressure for each frequency including a human inaudible frequency band, obtains audible signal in which the frequency of the abnormal sound signal indicating the intensity of the sound pressure of the abnormal sound in the inaudible frequency band is changed to a human audible frequency band in the signal corresponding to the frequency characteristic, and output the audible signal as an audible sound signal that is a signal indicating a change in sound pressure intensity over time, and a speaker that generates sound based on the audible sound signal.