Title:
BASS REFLEX PORT AND ACOUSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/008472
Kind Code:
A1
Abstract:
A bass reflex port according to the present invention is provided with a pipe body. An inner wall surface of the pipe body includes a plurality of regions in which the viscous resistance in a pipe axis direction between moving air and the inner wall surface differ. The plurality of regions are provided in the circumferential direction of the inner wall surface.
Inventors:
MIKI AKIRA (JP)
ONITSUKA HIROFUMI (JP)
UCHIDA KATSUYA (JP)
ONITSUKA HIROFUMI (JP)
UCHIDA KATSUYA (JP)
Application Number:
PCT/JP2017/023563
Publication Date:
January 11, 2018
Filing Date:
June 27, 2017
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H04R1/02
Foreign References:
| JPH01241297A | 1989-09-26 | |||
| US6019188A | 2000-02-01 |
Other References:
See also references of EP 3484170A4
Attorney, Agent or Firm:
TACHIBANA, Kenji et al. (JP)
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