Title:
VENTILATION PART
Document Type and Number:
Japanese Patent JP2021189334
Kind Code:
A
Abstract:
To provide a ventilation part which can effectively improve sound muffling performance of a wall.SOLUTION: An intake duct 11 is provided with at least a part of a peripheral wall 12 having a wall portion 13 having an inner layer 14 containing fibers and having air permeability and an outer layer 15 having elasticity provided on the outer peripheral side of the inner layer 14. In the wall portion 13, a natural frequency of a vibration system when the inner layer 14 is a mass portion and the outer layer 15 is a spring portion is partially changed.SELECTED DRAWING: Figure 1
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Inventors:
KIMURA RYUSUKE
Application Number:
JP2020095478A
Publication Date:
December 13, 2021
Filing Date:
June 01, 2020
Export Citation:
Assignee:
TOYOTA BOSHOKU CORP
International Classes:
G10K11/16; G10K11/172
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda
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