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Audio Engineering Explained by Douglas Self

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PREFACE

 

 

The second chapter on microphone technology by John Eargle focuses on the electrical aspects of microphone operation, including phantom powering, microphone transformers, mixing console microphone preamplifi ers, microphone splitters, cable losses, ground loops, RF microphones, and the latest so-called “digital” microphones.

The powering of microphones is a big subject in itself. Dynamic microphones, in which a coil attached to the diaphragm moves in the fi eld of a permanent magnet, do not require external power, but they are not generally considered to be in the fi rst line of quality. Capacitor microphones do need power, and the standard method is “phantom powering” which applies + 48V to the hot and cold signal connection through ...

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