Title:
DETERMINATION METHOD OF ACOUSTIC DIAPHRAGM, AND METHOD OF MANUFACTURING ACOUSTIC DIAPHRAGM USING THIS DETERMINATION METHOD
Document Type and Number:
Japanese Patent JP2015216496
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem of a flat original plate having in-plane density distribution that it is difficult to generate uniform in-plane reflection sound by processing only the outer edge shape into a target shape.SOLUTION: A diaphragm is produced by scraping the surface of a flat original plate, feature data is acquired at 5-9 places in-plane by integrating the vibration strength to the frequency for a predetermined time, and then a determination is made that an acoustic diaphragm achieving uniform in-plane vibration state is obtained, by a feature peak appearing at a common frequency position, for each feature data thus acquired, in the determination method of an acoustic diaphragm. A method of manufacturing an acoustic diaphragm is also provided.
Inventors:
ONODA TOMOYUKI
Application Number:
JP2014097960A
Publication Date:
December 03, 2015
Filing Date:
May 09, 2014
Export Citation:
Assignee:
ONODA TOMOYUKI
HIROKUNI YOSHINORI
HIROKUNI YOSHINORI
International Classes:
H04R31/00; G10D3/02; H04R7/12; H04R17/00
Domestic Patent References:
| JPH0473689A | 1992-03-09 | |||
| JPS5685478U | 1981-07-09 | |||
| JP2006352861A | 2006-12-28 | |||
| JP2006010869A | 2006-01-12 |
Foreign References:
| US20130055875A1 | 2013-03-07 |
Attorney, Agent or Firm:
Mitsuo Fukushima
Takayuki Mayuki
Tetsuya Shioda
Takayuki Mayuki
Tetsuya Shioda
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