Research on Calibrations of Phase Mismatch in Sound Intensity Microphone Pairs

ZHOU Changhua; LUO Benyi; DAI Bin

doi:10.12338/j.issn.2096-9015.2023.0276

Volume 67 Issue 11

Nov. 2023

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ZHOU Changhua, LUO Benyi, DAI Bin. Research on Calibrations of Phase Mismatch in Sound Intensity Microphone Pairs[J]. Metrology Science and Technology, 2023, 67(11): 85-90. doi: 10.12338/j.issn.2096-9015.2023.0276

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ZHOU Changhua, LUO Benyi, DAI Bin. Research on Calibrations of Phase Mismatch in Sound Intensity Microphone Pairs[J]. Metrology Science and Technology, 2023, 67(11): 85-90. doi: 10.12338/j.issn.2096-9015.2023.0276

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Research on Calibrations of Phase Mismatch in Sound Intensity Microphone Pairs

doi: 10.12338/j.issn.2096-9015.2023.0276

1.
Guangzhou Institute of Measurement and Testing Technology, Guangzhou 510063, China
2.
Spectris Instrumentation and Systems Shanghai Ltd., Guangzhou 510620, China

Received Date: 2023-11-15
Accepted Date: 2023-11-28
Rev Recd Date: 2023-11-27

Available Online: 2023-12-08

Publish Date: 2023-11-18

Abstract

Abstract

Sound intensity, an essential acoustical parameter indicating the direction of sound energy flow, is increasingly significant in acoustics, especially for sound power measurement and noise source identification. The two-microphone method is the prevalent technique for sound intensity measurement. This method, being approximate, inherently contains systematic errors and limits the frequency range for accurate measurement. Additionally, phase mismatch in microphone pairs is a critical factor affecting measurement accuracy. This paper focuses on accurately measuring the phase mismatch between two microphones, a key aspect of microphone pairing. Utilizing the coupler comparison method and electrostatic actuator method, the study achieves normalized and quantitative measurement of microphone phase mismatch. The research contributes to refining microphone pairing accuracy and enhancing sound intensity measurement reliability.
- metrology,
- sound intensity,
- sound intensity microphone pairs,
- P-P probe,
- coupler comparison method,
- electrostatic actuator method,
- phase mismatch

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References(30)

References

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