Title:
CENTER CAP FOR SPEAKER, SPEAKER EMPLOYING THE SAME, AND ELECTRONIC EQUIPMENT AND APPARATUS EMPLOYING THIS SPEAKER
Document Type and Number:
Japanese Patent JP2007028471
Kind Code:
A
Abstract:
To improve a sound pressure level in a high pitch range in a center cap for a speaker to be used for acoustic equipment, a speaker employing the same, and electronic equipment and an apparatus employing this speaker.
A center cap 29 is used for a speaker containing at least paper pulp and aromatic polyamide, and microfibrilizes the aromatic polyamide. The center cap contains the aromatic polyamide by not less than 2% in weight ratio. With this configuration, the rigidity of the center cap 29 can be improved and the sound pressure level of the speaker employing this center cap 29 can be improved in a high pitch range.
Inventors:
SUMIYAMA MASAHIDE
MIMURA KAZUYOSHI
MIMURA KAZUYOSHI
Application Number:
JP2005210923A
Publication Date:
February 01, 2007
Filing Date:
July 21, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04R9/02
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano
Hiroki Naito
Daisuke Nagano
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