Title:
NOISE REDUCING DEVICE
Document Type and Number:
Japanese Patent JP2012166758
Kind Code:
A
Abstract:
To provide a noise reducing device that reduces noise, while preventing reduction in air volume.
A plurality of projections 40 are arranged in a predetermined place as an irregular reflection member on an inner wall 11a of an air-conditioning case 11. The projections 40 are arranged on a pair of opposed inner walls 11a among the inner walls 11a. Since a low of sound reflection can be applied to micro concave and convex shape such as a plurality of projections 40, the reflection direction is scattered in a macro view point, and a position where a phase of an incident wave is synchronized with a reflected wave can be displaced. Thus, sound amplification caused by synchronization of the phases can be prevented.
Inventors:
KAMIYA MASARU
Application Number:
JP2011031172A
Publication Date:
September 06, 2012
Filing Date:
February 16, 2011
Export Citation:
Assignee:
DENSO CORP
International Classes:
B60H1/00
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo