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Stand By Me – Microphones and their applications

Principles

A microphone is a device for turning acoustic energy, in the form of sound, into electrical energy, a similar function to that performed by the ear. Fortunately, the process is far simpler than that described for the ear because, instead of transforming the sound vibrations into the frequency domain and coding the intensity and low-frequency phase information into a pulse-density bitstream, the microphone simply converts the vibrations in the air into analogous electrical vibrations within an electric circuit. The signal is thus an analogy of the original sound, and circuits which continue to treat the signal in this manner are known as analogue circuits. There are, as yet, no direct ...

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