This article will discuss the distinction in sensitivity specifications between analog and digital microphones, how to choose a microphone with the best sensitivity for the application, and why adding a bit (or more) of digital gain can enhance the microphone signal. Mapping units in the acoustic domain to units in the electrical domain determines the magnitude of the microphone output signal, given a known input. Sensitivity, the ratio of the analog output voltage or digital output value to the input pressure, is a key specification of any microphone.
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