Title:
吸音材
Document Type and Number:
Japanese Patent JP6761618
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sound absorber whose sound absorption performance is effectively improved by laminating an air permeable skin material, and which thus is excellent in sound absorption performance.SOLUTION: Sound absorption performance of a sound absorber changes greatly depending on the combination of a ventilation resistance per unit thickness in an air permeable skin material and a ventilation resistance per unit thickness in an air permeable skin material. When a ventilation resistance per unit thickness in an air permeable skin material is 20 times to less than 2514 times of a ventilation resistance per unit thickness in an air permeable base material, the sound absorption performance of the sound absorber can be effectively improved by laminating the air permeable skin material. The sound absorber is formed by laminating the air permeable skin material on the air permeable base material, and the ventilation resistance per unit thickness in the air permeable skin material is 20 times to less than 2514 times of the ventilation resistance per unit thickness in the air permeable base material.
Inventors:
Ken Tanizawa
Go Kobayashi
Noriko Michihata
Go Kobayashi
Noriko Michihata
Application Number:
JP2013264734A
Publication Date:
September 30, 2020
Filing Date:
December 23, 2013
Export Citation:
Assignee:
Japan Vilene Co., Ltd.
International Classes:
G10K11/162
Domestic Patent References:
| JP2014529524A | ||||
| JP200833160A | ||||
| JP200918745A | ||||
| JP8152890A | ||||
| JP2004271797A |