Measurements of hydrophone responsivity in air reveal frequency sensitivity and detection limits, indicating performance potential.
We describe the measurements which we have conducted to determine the responsivity of our prototype fiber optic hydrophone in air in the frequency range up to 10 kHz. Hydrophone calibration was performed with the help of a microphone with a known frequency response characteristic. Hydrophone responsivity was found to be flat within ±6 dB in the given frequency range. We also studied the minimum pressure amplitude detectable by our hydrophone in air.
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M. et al. (2007) studied this question.
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