Title:
HIGH SOUND PRESSURE MICROPHONE CALIBRATING DEVICE, SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2021/007872
Kind Code:
A1
Abstract:
Disclosed are a high sound pressure microphone calibrating device, system and method. Said device comprises a loudspeaker and a coupling cavity; the loudspeaker is fixedly arranged at the bottom of the coupling cavity to form a loudspeaker rear cavity, the coupling cavity is formed by nested tubular cavities of different sizes, and comprises a resonance tube, a transition tube and a small tube, the resonance tube, the transition tube and the small tube being coaxial circular tube sound cavities. The high sound pressure microphone calibrating device, system and method disclosed in the present invention solve the problems of low sound pressure level and high distortion under high sound pressure of common calibration devices on the market. Under the condition that the total harmonic distortion does not exceed 1%, the sound pressure level of a calibration sound source can reach up to 170dB, satisfying calibration requirements of most high sound pressure microphones.
Inventors:
WANG FAN (CN)
LI HUIHAO (CN)
QIAO JIE (CN)
LI HUIHAO (CN)
QIAO JIE (CN)
Application Number:
PCT/CN2019/096670
Publication Date:
January 21, 2021
Filing Date:
July 19, 2019
Export Citation:
Assignee:
ZKXY TECH CO LTD (CN)
International Classes:
H04R29/00
Foreign References:
| CN102655628A | 2012-09-05 | |||
| CN101986723A | 2011-03-16 | |||
| CN109916504A | 2019-06-21 | |||
| CN105163262A | 2015-12-16 | |||
| US9980023B1 | 2018-05-22 |
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