Title:
ACTIVE NOISE CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/235231
Kind Code:
A1
Abstract:
A speaker 10 includes an emission surface (15). The emission surface (15) has a first region (15a), a second region (15b), and a third region (15c) that is between the first region (15a) and the second region (15b). When an axis that passes through the third region (15c) and extends away from the emission surface (15) is defined as a reference axis (10X), the speaker (10) forms a first wavefront (16a) that propagates from the first region (15a) to approach the reference axis (10X) and a second wavefront (16b) that propagates from the second region (15b) to approach the reference axis (10X).
Inventors:
OTO KOHEI (JP)
KOMOTO YUSUKE (JP)
OBAN RYOHEI (JP)
YAMAMOTO SAORI (JP)
KAJIKAWA YOSHINOBU (JP)
HIROSE SHUN (JP)
KOMOTO YUSUKE (JP)
OBAN RYOHEI (JP)
YAMAMOTO SAORI (JP)
KAJIKAWA YOSHINOBU (JP)
HIROSE SHUN (JP)
Application Number:
PCT/JP2020/015246
Publication Date:
November 26, 2020
Filing Date:
April 02, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
THE SCHOOL CORPORATION KANSAI UNIV (JP)
THE SCHOOL CORPORATION KANSAI UNIV (JP)
International Classes:
G10K11/178
Domestic Patent References:
| WO2017126257A1 | 2017-07-27 |
Foreign References:
| JP2015215415A | 2015-12-03 | |||
| JP2004004583A | 2004-01-08 | |||
| JP2016122187A | 2016-07-07 |
Other References:
See also references of EP 3975169A4
Attorney, Agent or Firm:
KAMADA Koichi et al. (JP)
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