Title:
SOUND GENERATOR
Document Type and Number:
WIPO Patent Application WO/2018/168477
Kind Code:
A1
Abstract:
Provided is a sound generator with which it is possible to adjust a frequency band in which noise is easily reducible. Due to the fact that an enclosure (3A) is provided with a pipe-shaped part (4) and a vibration member (5) as resonance elements and a flat area is formed in a phase characteristics graph, a generated sound by a sound generator (1A) can be made to be an antiphase of noise, and noise can be easily reduced at frequencies of the flat area. In this case, by appropriately setting the element resonance frequencies of the pipe-shaped part (4) and the vibration member (5) it is possible to adjust the flat area, and to adjust a frequency band in which noise is easily reducible.
Inventors:
DOHI HIROYUKI (JP)
HIWATARI SATORU (JP)
KIMURA YOSHIHIRO (JP)
FUJIMOTO KENTA (JP)
KOBAYASHI HIROYUKI (JP)
HIWATARI SATORU (JP)
KIMURA YOSHIHIRO (JP)
FUJIMOTO KENTA (JP)
KOBAYASHI HIROYUKI (JP)
Application Number:
PCT/JP2018/007617
Publication Date:
September 20, 2018
Filing Date:
February 28, 2018
Export Citation:
Assignee:
PIONEER CORP (JP)
PIONEER TOHOKU CORP (JP)
PIONEER TOHOKU CORP (JP)
International Classes:
H04R1/02; H04R1/28
Foreign References:
| JP2006345498A | 2006-12-21 | |||
| JPH07203576A | 1995-08-04 | |||
| JP2009118366A | 2009-05-28 |
Attorney, Agent or Firm:
TAKINO, Fumio et al. (JP)
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