Title:
SPEAKER EQUIPMENT
Document Type and Number:
Japanese Patent JP3185510
Kind Code:
B2
Abstract:
PURPOSE: To achieve the reproducibility of high fidelity by improving the acoustic characteristic extending over from a low sound range to a high sound range.
CONSTITUTION: This equipment consists of an acoustic diaphragm 1, a voice coil bobbin 3 which is connected to this acoustic diaphragm 1 and has a voice coil 4 wound round, and a magnetic circuit 2 arranged in a position facing the voice coil 4. At least the voice coil bobbin 3 is made of the cellulose produced by cultivation of microbes. The diaphragm part and the bobbin part of the acoustic diaphragm having these parts may be made of the cellulose produced by cultivation of microbes as one body. This cellulose can be α-cellulose or cellulose produced by microbes belonging to one of the acetobacter group, the pseudomonas group, and the agrobacterium group. A second diaphragm material may be laminated on the acoustic diaphragm or the diaphragm part.
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Inventors:
Jun Kishigami
Masaru Uryu
Masaru Uryu
Application Number:
JP146694A
Publication Date:
July 11, 2001
Filing Date:
January 12, 1994
Export Citation:
Assignee:
ソニー株式会社
International Classes:
C12S3/08; D21C5/00; H04R7/02; H04R9/04; (IPC1-7): H04R9/04; C12S3/08; D21C5/00; H04R7/02
Domestic Patent References:
| JP662496A |
Attorney, Agent or Firm:
Akira Koike (2 outside)