Microphone INMP441 MEMS - I2S
The INMP441 MEMS Microphone Module is a high-performance digital MEMS microphone with an I2S interface, designed for clear and accurate audio capture. It features low noise, high sensitivity, and excellent signal quality, making it ideal for voice recognition, smart assistants, audio recording, IoT devices, and projects using Arduino, ESP32, Raspberry Pi, and STM32.
⚙️ Key Features
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Digital I2S audio output
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High-performance MEMS microphone
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Low-noise audio capture
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Omnidirectional microphone
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High sensitivity and wide dynamic range
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Compact PCB design
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Compatible with ESP32, STM32, Raspberry Pi, and other I2S-enabled microcontrollers
📦 Technical Specifications
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| Microphone Type | MEMS Digital Microphone |
| Model | INMP441 |
| Operating Voltage | 1.8V – 3.3V DC |
| Output Interface | I2S |
| Directionality | Omnidirectional |
| Sensitivity | -26 dBFS (Typical) |
| Signal-to-Noise Ratio (SNR) | 61 dBA (Typical) |
| Frequency Response | 60 Hz – 15 kHz |
| Supply Current | Approx. 1.4 mA |
| Dimensions | Approx. 15 × 10 mm |
📌 Pin Configuration
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| VDD | Power Supply (1.8V–3.3V) |
| GND | Ground |
| SCK | I2S Serial Clock (BCLK) |
| WS | Word Select (LRCLK) |
| SD | Serial Data Output |
| L/R | Left / Right Channel Selection |
🛠️ Applications
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Voice recognition systems
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Smart assistants
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Audio recording projects
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ESP32 voice applications
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IoT devices
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Sound level monitoring
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Robotics
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Digital audio processing
📚 Arduino Library
Library Required: None (uses the built-in I2S interface of the microcontroller).
