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Microphone spec sheets specify a microphone’s sensitivity by displaying the voltage at the output of the microphone when 1 Pa is applied to the diaphragm. If a microphone has an output voltage of 2.5mV @ 1Pa, what would its output voltage be when 98dB SPL is applied to the diaphragm?

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  • \$\begingroup\$ if 2.5mV @ 1Pa at half the level of a jackhammer 2Pa = 100dB.spl @ 1m would be 5mV so 98 dB is 2 dB down from 5mV \$\endgroup\$ Dec 18, 2020 at 2:04

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The reference pressure for dbSPL is 20 micro Pascal so 1 Pascal is roughly 94 dB SPL. 98 dB SPL is about 1.59 Pa and the output voltage of your microphone would be around 3.7 mV.

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  • \$\begingroup\$ the answer is 3.7 mV? \$\endgroup\$ Dec 18, 2020 at 0:49

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