SMD Electret Microphone

The SMD Electret Microphone is a compact surface-mount microphone used for capturing audio signals in embedded systems and PCB designs. It converts sound waves into small electrical signals and is commonly used in audio detection circuits, voice modules, IoT devices, and sound sensor boards.

Unlike ready-made sound sensor modules, this is a bare microphone element and requires an external amplifier circuit (like LM358 or MAX9814) to process the signal.

🔹 Key Features

• Surface Mount Device (SMD) type

• Compact and lightweight

• High sensitivity to sound

• Low power consumption

• Suitable for custom PCB design

🔹 Typical Specifications

• Type: Electret condenser microphone

• Mounting: SMD

• Operating voltage: Usually 2V–10V (with bias)

• Sensitivity: Around –42 dB (varies by model)

• Output: Analog audio signal

🔹 Applications

• Custom sound detection circuits

• Voice recording modules

• Noise level monitoring

• IoT audio sensing projects

• DIY electronics & PCB prototyping