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InterviewSolution
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What Is The Anticipated Impact Of Using A Microphone At 6290 Ft. Above Sea Level? |
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Answer» As static pressure INCREASES, SENSITIVITY goes down. Higher pressure means higher air density, which increases the acoustic impedance on surface of the diaphragm and in the gap between the diaphragm and the backplate. This has an effect on displacement. At 6290 ft. the BAROMETRIC pressure is 47 KPA, which is a change of -54 kPa. If we APPLY that to the pressure correction, the result is -54 kPa x -0.013 dB/kPa = 0.70 dB re 1V/Pa. As static pressure increases, sensitivity goes down. Higher pressure means higher air density, which increases the acoustic impedance on surface of the diaphragm and in the gap between the diaphragm and the backplate. This has an effect on displacement. At 6290 ft. the barometric pressure is 47 kPa, which is a change of -54 kPa. If we apply that to the pressure correction, the result is -54 kPa x -0.013 dB/kPa = 0.70 dB re 1V/Pa. |
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