Title:
ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2015/174491
Kind Code:
A1
Abstract:
Provided is an electroacoustic transducer which with a single speaker unit achieves high directivity across a wide frequency range, from low frequency sounds to high frequency sounds. This electroacoustic transducer is provided with: a vibrating body (1) which is provided with a cone (11) formed in a conical shape, e.g., a circular cone shape or an elliptical cone shape, and with an aliform portion (14) which comprises a pair of vertically-divided cylindrical surfaces (12) formed in parallel and which forms a valley between one side portion of each neighboring, vertically-divided cylindrical surface (12); a conversion unit which converts between vibration of the vibration body along the axis of the cone and an electric signal corresponding to said vibration; and a support unit which supports the vibration body movably along the axial direction of the cone. The bottom of the valley in the aliform portion and a small-diameter portion of the cone is fixed to the conversion unit.
Inventors:
NORO MASAO (JP)
Application Number:
PCT/JP2015/063891
Publication Date:
November 19, 2015
Filing Date:
May 14, 2015
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H04R1/24; H04R7/12; H04R7/26; H04R9/04
Foreign References:
| JP2002034097A | 2002-01-31 | |||
| JP2009278523A | 2009-11-26 | |||
| JPH08102988A | 1996-04-16 |
Other References:
See also references of EP 3145214A4
Attorney, Agent or Firm:
CHUBU PATENT OFFICE (JP)
Central patent business corporation international patent firm (JP)
Central patent business corporation international patent firm (JP)
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