Why Are Condenser Microphone Diaphragms Gold-Sputtered

Condenser microphone diaphragms are gold-sputtered for a number of reasons. First, gold is an excellent conductor of electricity, so it helps to minimize electrical impedance in the diaphragm. This is important because it reduces noise and distortion in the signal. Gold also has a very low coefficient of thermal expansion, meaning that it doesn’t change […]

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