4/4/2023 0 Comments How do microphones work![]() ![]() As the sound waves vibrate the diaphragm, the varying distance between the diaphragm and the back plate causes the voltage across the capacitor to change. The diaphragm detects subtle variations in air pressure, which make up the sound of the room, vocal, or instrument being recorded. The capacitor is housed in what’s called a microphone capsule, and it can be plainly seen in entirety when you remove the microphone grille from most condenser mics. ![]() One of the metal plates is called a back plate, which is typically made of solid brass, and the other is called a diaphragm, made of very lightweight metal or in many cases gold-sputtered mylar. The capacitor in a studio condenser microphone consists of two metal-surfaced plates suspended in very close proximity to each other with a voltage across them. Condenser mics are best known for their sound sensitivity, wide frequency response, and phantom power requirements, but what’s going on inside to give them that signature sound? Let’s take a closer look:Ĭondenser mics get their name from the “capacitor” inside that converts acoustic energy into an electrical signal (“condenser” is an old term for “capacitor”). ![]()
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