Equipment and materials · equipment
Condenser microphone backplate
Also known as capsule backplate.
The rigid conductive plate positioned close to a condenser microphone diaphragm to form a variable capacitor.
In practice
Sound moves the diaphragm and changes its spacing from the backplate, varying the capacitance and producing the audio signal. The capsule design, polarization method, and active impedance-conversion electronics are parts of the microphone’s operating system and should not be confused with its pickup pattern.
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Sources
Educational reference only. Requirements vary by jurisdiction, employer, venue, and production context.