9x7mm 9767 Electret Microphone

The 9767 Electret Microphone (9.7x7mm) is a standard miniature condenser capsule used for audio recording and voice sensing.Core Specifications

• Size: 9.7 mm diameter, 7.0 mm height.
• Directivity: Omnidirectional (picks up sound from all directions).
• Operating Voltage: 1.5V to 10V DC (3V typical).
• Impedance: 2.2 k.
• Connection: 2-pin (solder pads or through-hole pins).

Pin Identification

• Negative (-): Pin connected to the outer aluminum casing via small metal traces.
• Positive (+): Isolated pin used for power and signal output.

Basic Wiring Setup

1. Ground: Connect the negative pin to circuit ground.
2. Power: Connect the positive pin to 3V5V through a 2.2k resistor to provide bias current.
3. Signal Output: Link a 0.1F to 10F capacitor to the positive pin to block DC and output the audio signal.