Title:
DIRECTIONAL LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/2013/042316
Kind Code:
A1
Abstract:
This directional loudspeaker generates sound waves by vibrating a diaphragm, which is provided with a piezoelectric element, by superimposing audible sound signals on carrier waves in a supersonic region and inputting the signals to the piezoelectric element. The diaphragm is fixed to a fixing section via a plurality of beams that are provided on the outer circumference of the diaphragm.
Inventors:
KONNO FUMIYASU
TAKEDA KATSU
TAKEDA KATSU
Application Number:
PCT/JP2012/005396
Publication Date:
March 28, 2013
Filing Date:
August 28, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
KONNO FUMIYASU
TAKEDA KATSU
KONNO FUMIYASU
TAKEDA KATSU
International Classes:
H04R7/00; H04R1/40; H04R3/00; H04R17/00
Foreign References:
| JP2010157886A | 2010-07-15 | |||
| JPS6365393U | 1988-04-30 | |||
| JPS58157293A | 1983-09-19 | |||
| JPS55104892U | 1980-07-22 | |||
| JPS3617558B1 | ||||
| JPS3617557B1 | ||||
| JPS5911600U | 1984-01-24 | |||
| JP2001197594A | 2001-07-19 | |||
| JPH09284897A | 1997-10-31 | |||
| JP2000350293A | 2000-12-15 | |||
| JP2007104650A | 2007-04-19 | |||
| JP2012134599A | 2012-07-12 | |||
| JP2006245731A | 2006-09-14 |
Other References:
See also references of EP 2760224A4
Attorney, Agent or Firm:
NAITO, Hiroki et al. (JP)
Hiroki Naito (JP)
Hiroki Naito (JP)
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Claims: