Capture Sound with Precision & Clarity

The INMP441 Omnidirectional MEMS Microphone Module is designed for high-quality digital audio capture while keeping power consumption low. With its built-in I2S interface, it connects directly to modern microcontrollers like the ESP32—no analog circuitry, no noise issues, just clean and accurate sound data. Whether you’re building a voice-controlled gadget, audio recorder, or real-time sound analyzer, this microphone delivers professional results in a tiny package.

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Why This Microphone Stands Out

• High Precision MEMS Technology: Offers excellent sensitivity and clarity for speech and environmental audio.

• Omnidirectional Pickup: Captures sound evenly from all directions—great for room audio, voice commands, and monitoring.

• Digital I2S Interface: Eliminates analog noise and makes wiring simple. Perfect for ESP32, Raspberry Pi, and other I2S-capable boards.

• Low Power Consumption: Ideal for portable and battery-powered projects.

• Built-In Data Stream Control: Outputs clear digital audio with minimal processing required.

• Compact & Durable: Small PCB with stable MEMS construction for long-term reliability.

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Perfect For…

• Voice recognition and voice assistants

• IoT sound detection systems

• Audio recording and streaming projects

• Noise level monitoring (dB meters)

• Smart home devices

• Portable sound analyzers

• ESP32-based projects requiring clean audio input

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Key Specifications

• Microphone Type: Omnidirectional MEMS

• Interface: I2S (digital audio)

• Operating Voltage: Typically 3.3V

• Low power, low noise design

• Frequency Response: Suitable for speech and general audio

• Compatible Boards: ESP32, Raspberry Pi, STM32, Teensy (I2S mode)

• Output: Digital data (no analog output)

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Usage Tips

• Connect SD, WS, and SCK pins to the ESP32’s I2S-capable pins for proper audio capture.

• Keep wiring short to maintain signal clarity.

• Use libraries like ESP-IDF or Arduino I2S examples for fast setup.

• Ensure the microphone opening faces the sound source for best performance.

• Avoid blocking the port with enclosures or foam unless acoustically designed.

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Final Thought

The INMP441 MEMS Microphone Module is the go-to solution for clean, accurate, digital audio input in ESP32 and I2S-based projects. Compact, low-power, and incredibly effective, it gives makers and engineers everything they need for advanced audio applications.