Title:
スピーカ装置
Document Type and Number:
Japanese Patent JP4445182
Kind Code:
B2
Abstract:
A speaker capable to playback in wide frequency range by means of reducing peak values of amplitude of resonance frequencies in frequency characteristics is provided by means of differing a radius of curvature R1 of an inner diaphragm 10a and a radius of curvature R2 of an outer diaphragm 10b to differ resonance frequencies of the inner diaphragm 10a and the outer diaphragm 10b. Furthermore, by means of equalizing an area S1 of the inner diaphragm 10a and an area S2 of the outer diaphragm 10b, sound pressure levels of the inner and outer diaphragms 10a, 10b are equalized with each other.
Inventors:
Hideaki Sugiura
Application Number:
JP2002094304A
Publication Date:
April 07, 2010
Filing Date:
March 29, 2002
Export Citation:
Assignee:
Pioneer Corporation
Tohoku Pioneer Co., Ltd.
Tohoku Pioneer Co., Ltd.
International Classes:
H04R1/24; H04R9/04; H04R1/30; H04R7/12; H04R9/06
Domestic Patent References:
| JP51120711A | ||||
| JP6068798A | ||||
| JP63120588A |
Attorney, Agent or Firm:
Hideo Takino
Sadao Matsumura
Sadao Matsumura