Title:
METHOD AND SYSTEM FOR ACQUIRING NATURAL FREQUENCY OF DIAPHRAGM
Document Type and Number:
WIPO Patent Application WO/2015/161734
Kind Code:
A1
Abstract:
The present invention provides a method and system for acquiring the natural frequency of a diaphragm, which are used for acquiring the natural frequency of the diaphragm through the use of a closed space consisting of a structural cavity and the diaphragm. The method comprises: selecting test frequency points in the closed space, converting an externally-input electric signal into an acoustic signal, directing sound into the closed space, and acquiring the acoustic pressure of each test frequency point; adjusting the externally-input electric signal until the acoustic pressure of each one of the test frequency points in the closed space is the same; converting the adjusted electric signal into an acoustic signal to vibrate the diaphragm; acquiring the amount of displacement generated by the vibration of the diaphragm; and taking the frequency corresponding to the maximum displacement generated by the vibration of the diaphragm as the natural frequency of the diaphragm. By adopting the method and the system, the natural frequency of the diaphragm can be determined by acquiring the maximum displacement generated by the vibration of the diaphragm. Moreover, the process of acquiring the natural frequency of the diaphragm is not affected by the surrounding environment, and therefore the acquired result is more accurate.
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Inventors:
QIU DONG (CN)
JIANG CHAO (CN)
JIANG CHAO (CN)
Application Number:
PCT/CN2015/075663
Publication Date:
October 29, 2015
Filing Date:
April 01, 2015
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R7/12
Foreign References:
| CN103997706A | 2014-08-20 | |||
| CN103219001A | 2013-07-24 | |||
| CN203165453U | 2013-08-28 | |||
| TW200949261A | 2009-12-01 | |||
| JP2002090238A | 2002-03-27 |
Attorney, Agent or Firm:
BEIJING GRANDER IP LAW FIRM (CN)
北京鸿元知识产权代理有限公司 (CN)
北京鸿元知识产权代理有限公司 (CN)
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