Title:
SPEAKER APPARATUS
Document Type and Number:
Japanese Patent JP3914449
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a speaker apparatus capable of reproducing a bass signal with a frequency characteristic as flat as possible while it is small.
SOLUTION: The speaker apparatus is provided with an acoustic volume portion, an acoustic tube mounted on the volume portion, and a driving speaker mounted on the volume portion. The resonation frequency of the tube is set at a value higher than a Helmholtz resonance frequency generated by the volume portion and the tube by 0.5-2.5 octave. A Helmholtz resonator is formed by the volume portion and the tube, and resonates at a prescribed Helmholtz resonance frequency. Also, the tube itself has a resonance frequency. In this apparatus, by setting the resonance frequency of the tube itself at the value higher than the resonance frequency of the Helmholtz frequency by 0.5-2.5 octave, the speaker apparatus emitting continuous bands from the Helmholtz resonance frequency to the resonance frequency of the tube can be obtained.
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Inventors:
Maekawa Koji
Toi Hiroyuki
Toi Hiroyuki
Application Number:
JP2002091762A
Publication Date:
May 16, 2007
Filing Date:
March 28, 2002
Export Citation:
Assignee:
Pioneer Corporation
Tohoku Pioneer Co., Ltd.
Tohoku Pioneer Co., Ltd.
International Classes:
H04R1/02; H04R1/28; H04R1/34; (IPC1-7): H04R1/28; H04R1/02
Domestic Patent References:
| JP5041896A | ||||
| JP9163486A | ||||
| JP4109799A | ||||
| JP62254598A | ||||
| JP2001292490A | ||||
| JP2000253483A |
Attorney, Agent or Firm:
Satoshi Nakamura
Tatsuo Egami
Tatsuo Egami