Title:
VEHICLE-USE SOUND OUTPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/162490
Kind Code:
A1
Abstract:
The present invention appropriately suppresses abnormal noise when beginning or ending emission of a sound. Disclosed is a vehicle-use sound output device including a sounding body, an amplifier circuit that is electrically connected to the sounding body, and a controller that is electrically connected to the amplifier circuit and supplies a drive signal corresponding to a sound to be emitted to the amplifier circuit. The drive signal is formed by combining a first drive signal and a second drive signal. The first drive signal has a first rise corresponding to the beginning of the sound to be emitted and a first fall corresponding to the end of the sound. The second drive signal has at least one of a second fall corresponding to the first rise and a second rise corresponding to the first fall.
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Inventors:
TANAKA TATSUYA
KATO KOU
KATO KOU
Application Number:
PCT/JP2020/004309
Publication Date:
August 13, 2020
Filing Date:
February 05, 2020
Export Citation:
Assignee:
NIPPON SEIKI COLTD (JP)
International Classes:
B60R16/02; G10K9/12; G10K15/04
Foreign References:
| JP2009260544A | 2009-11-05 | |||
| JP2001166782A | 2001-06-22 | |||
| JP2008225015A | 2008-09-25 |
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