Understanding Microphone Sensitivity

Understanding Microphone Sensitivity

Overview

Sensitivity, the ratio of the analog output voltage or digital output value to the input pressure, is a key specification of any microphone. Mapping units in the acoustic domain to units in the electrical domain, it determines the magnitude of the microphone output signal given a known input.

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.

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