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Tuesday, July 9 • 16:30 - 16:50
PROGRESS OF CALIBRATION METHODS FOR HIGH SOUND PRESSURE MICROPHONE

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High sound pressure microphones are widely used in the measurement of sound explosion and engine noise in the aerospace industry. The measured sound pressure level can reach 160 dB or even higher, which could have a serious impact on human body. The key indicators of high sound pressure microphones are sensitivity, linearity, distortion and frequency response under high sound pressure. In order to ensure accurate and effective measurements, the corresponding calibration methods are needed. This paper reviews the existing calibration methods for high sound pressure microphones, including pistonphone method, pressure-step method and resonant tube method, and explains their respective principles and applications. The pistonphone method is suitable for sound pressure calibration at low frequencies, the step pressure method is suitable for calibration of pulsed sound pressure, and the resonant tube method is suitable for calibration of microphones at a specific frequency point.


Tuesday July 9, 2019 16:30 - 16:50 EDT
Westmount 2
  T01 Ac. meas. & instrum., RS03 Measur uncert in acoust