INMP441 MEMS Digital I2S Microphone Module – High-Precision, Low-Noise Omnidirectional Mic for ESP32, Raspberry Pi & Arduino

Upgrade your audio projects with the INMP441 MEMS Digital Microphone Module, a high-precision and low-power omnidirectional microphone engineered for clean, accurate, and interference-free sound capture. Designed with a bottom-port MEMS sensor and a 24-bit I2S digital interface, this module connects directly to microcontrollers like ESP32, Raspberry Pi, Arduino, STM32, and other embedded systems—no ADC required.

Built for makers, IoT developers, and AI/voice-recognition applications, the INMP441 delivers exceptional clarity, high sensitivity, and stable frequency response from 60 Hz to 15 kHz, making it perfect for smart home devices, noise monitoring, voice assistants, and real-time audio processing.

🔥 Why Choose the INMP441 Microphone Module?

🎤 Ultra-Clear Digital Audio (24-bit I2S Output)

Captures high-definition digital audio without distortion. The I2S interface ensures better noise immunity compared to traditional analog microphones.

🔊 High Signal-to-Noise Ratio (61 dBA)

Provides clean sound even in noisy environments—perfect for speech detection, smart speakers, and acoustic analysis.

📡 Omnidirectional Pickup Pattern

Records sound evenly from all directions, ensuring natural and accurate audio, ideal for AI voice triggers and room-wide sound detection.

⚡ Low-Power, High-Performance Design

Consumes only 1.4 mA, making it suitable for battery-powered IoT and embedded devices.

🎧 Wide & Stable Frequency Response (60 Hz – 15 kHz)

Delivers rich, natural sound—great for audio recording, spectrum analysis, and environmental monitoring.

🔧 Direct Interface to ESP32 / Raspberry Pi / Arduino

The built-in I2S digital output eliminates the need for external ADCs or audio codecs.

🔌 Pinout & Interface Details

• SCK: Serial Clock

• WS: Word Select

• SD: Digital Audio Output

• L/R: Channel Selection

• VCC: 1.8V–3.3V supply

• GND: Ground

Quick ESP32 Connection Guide

• SCK → GPIO14

• SD → GPIO32

• WS → GPIO15

• L/R → GND

• VCC → 3.3V

• GND → GND

⭐ Technical Specifications

🧠 Perfect For:

• Voice assistants (Alexa, Google Assistant clones)

• ESP32 audio projects

• Smart home automation

• Noise level monitoring

• AI and machine learning sound models

• Voice recognition systems

• Audio processing & recording

• IoT devices

• Robotics & automation projects