Title:
SOUND WAVE GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/185593
Kind Code:
A1
Abstract:
This sound wave generation device (10) comprises a drive circuit (12) and a power auxiliary circuit (13). The drive circuit (12) has: a capacitor (C1) charged by a DC power source (V1); and a drive switching element (T1) that supplies power from the capacitor (C1) to a sound wave source (11) that generates heat by being powered, and generates sound waves. The power auxiliary circuit (13) supplies power to the drive circuit (12) so that the power supplied to the sound wave source (1) is not reduced due to switching of the drive switching element (T1) during an operation for generating a series of sound waves from the sound wave source.
Inventors:
SASAKI SHINICHI (JP)
ASADA TAKAAKI (JP)
ASADA TAKAAKI (JP)
Application Number:
PCT/JP2021/037862
Publication Date:
September 09, 2022
Filing Date:
October 13, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04R23/00; H04R3/00
Domestic Patent References:
| WO2012020600A1 | 2012-02-16 |
Foreign References:
| JP2016120462A | 2016-07-07 | |||
| US4668906A | 1987-05-26 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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