52 dB Electret Condenser Microphone (5 × 6 mm)🎤

This 52 dB capacitive electret microphone in a compact 5 × 6 mm form factor delivers reliable audio capture for both consumer electronics and embedded systems. With a wide frequency response and an internal FET buffer, it is an excellent choice for Arduino, Raspberry Pi, and other microcontroller-based projects that require clear, low-power audio input.

🌟 Key Features

• Compact size (5 × 6 mm) — ideal for space-constrained designs and portable devices.
• High sensitivity (52 dB) — effective pickup of soft sounds for voice and environmental audio.
• Omnidirectional — captures sound uniformly from all directions, simplifying placement.
• Low power consumption — extends battery life in mobile and IoT applications.
• Cost-effective — dependable performance compared to other condenser microphone types.

📐 Technical Specifications

• Type: Electret condenser (capacitive) microphone with internal FET amplifier
• Size: 5 × 6 mm
• Sensitivity: 52 dB (typical; consult the device datasheet for reference scale such as dBV/Pa)
• Frequency response: Typically 20 Hz to 20 kHz
• Impedance: High impedance capsule with built-in FET buffer
• Directivity: Omnidirectional

🧠 How It Works

This electret condenser microphone uses a permanently charged electret material to create a variable capacitance. Incoming sound waves move the diaphragm, changing the capacitance between the diaphragm and backplate. The resulting signal is buffered by the internal FET, producing an electrical output proportional to sound pressure.

🛠️ Integration and Design Tips

• Biasing (voltage and resistor): Provide a DC bias to the internal FET through a series resistor as per the manufacturer’s recommendations. The audio is then AC-coupled into your preamplifier or ADC.
• Signal conditioning: Use a low-noise preamp, appropriate gain, and AC coupling to interface with microcontroller or ADC modules. Add filtering (e.g., high-pass) to reduce handling and LF noise.
• Mechanical/acoustic design: Enclosure venting, front acoustic port alignment, and isolation grommets can significantly improve frequency response and reduce vibration noise.
• Noise considerations: Being omnidirectional, it will pick up ambient sound. Apply DSP or hardware noise-reduction techniques if needed.
• ESD and handling: Observe ESD precautions and avoid excessive heat during soldering to protect the capsule.

🤖 Compatible With Arduino, Raspberry Pi, and DIY Electronics

Integrate this microphone into Arduino or other microcontroller projects using a simple bias network and a microphone preamplifier module before sampling with an ADC. For Raspberry Pi, pair it with a USB audio interface or an I2S ADC module for high-quality capture. Ideal for voice detection, sound level monitoring, and audio feature extraction in electronics components projects where voltage, gain, and noise performance can be tuned to your application.

📦 Applications

• Consumer electronics: Smartphones, tablets, laptops, and portable recorders
• Hearing aids and medical devices: Small footprint with high sensitivity
• Voice-activated systems: Smart assistants, voice recognition, and IoT endpoints
• Recording equipment: Compact microphones and portable audio gear for hobbyist and professional use

✅ Why Choose This Microphone

With its 5 × 6 mm footprint, 52 dB sensitivity, and omnidirectional response, this electret microphone offers a practical balance of performance, size, and power efficiency. It is a versatile, easy-to-integrate choice for consumer electronics, medical devices, and embedded audio applications—perfect for both engineers and hobbyists building with Arduino, Raspberry Pi, and other microcontroller modules.