Title:
SOUND CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2019191489
Kind Code:
A
Abstract:
To reduce passenger discomfort due to noise in the vehicle compartment without using soundproofing materials.SOLUTION: A roof lining 20 provided in the vehicle 10 having the passenger compartment S1, a vibration portion 22 provided in the roof lining 20 and capable of vibrating in the plate thickness direction of the roof lining 20 are provided. The vibration portion 22 is configured to vibrate in a phase opposite to the phase of the standing wave W1 generated by the cavity resonance in the passenger compartment S1. It is characterized by vibrating the vibration portion 22 in a phase opposite to the phase of the standing wave W1 generated by the cavity resonance in the passenger compartment S1, that the standing wave W1 can be reduced by generating a sound wave having a phase opposite to that of the standing wave W1, and that noise in the passenger compartment S1 is reduced.SELECTED DRAWING: Figure 1
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Inventors:
MATSUYAMA SOHEI
KATO DAISAKU
NAGANO MASAHIRO
KATO DAISAKU
NAGANO MASAHIRO
Application Number:
JP2018086953A
Publication Date:
October 31, 2019
Filing Date:
April 27, 2018
Export Citation:
Assignee:
TOYOTA BOSHOKU CORP
International Classes:
G10K11/178; B60R13/08; H04R1/02; H04R17/00
Attorney, Agent or Firm:
Akatsuki Joint Patent Office