Active noise control system
AssigneesNitto Denko Corporation, The School Corporation Kansai University
InventorsKohei OTO, Yusuke KOMOTO, Ryohei OBAN, Saori YAMAMOTO, Yoshinobu KAJIKAWA, Shun HIROSE
Life of this patent
Estimating the term…
Abstract
A speaker (10) includes a radiation surface (15). The radiation surface (15) has a first region (15a), a second region (15b), and a third region (15c) between the first region (15a) and the second region (15b). When an axis passing through the third region (15c) and extending away from the radiation surface (15) is defined as a reference axis (10X), the speaker (10) forms a first wavefront (16a) propagating from the first region so as to approach the reference axis (10X) and a second wavefront (16b) propagating from the second region (15b) so as to approach the reference axis (10X).
Claims12
An active noise control system comprising:
- a structure;
- and
- a speaker attached to the structure, wherein
- the speaker includes a radiation surface,
- the radiation surface has a first region, a second region, and a third region between the first region and the second region, and
- when an axis passing through the third region and extending away from the radiation surface is defined as a reference axis, the speaker forms a first wavefront propagating from the first region so as to approach the reference axis and a second wavefront propagating from the second region so as to approach the reference axis.
An active noise control system comprising:
- a structure;
- and
- a speaker attached to the structure, wherein
- the speaker includes a radiation surface, a piezoelectric film, and an interposed layer,
- the interposed layer is disposed between the structure and the piezoelectric film, and
- the interposed layer is a porous body layer and/or a resin layer.
Dependencies are inferred from the claim text.