INMP441 I2S MEMS Microphone Module

The INMP441 I2S MEMS Microphone Module is a high-performance digital microphone module designed for audio capture in embedded electronics projects. It uses the I2S digital audio interface, allowing it to connect directly to compatible microcontrollers such as ESP32 without requiring an external audio codec.

This module is suitable for projects that require clear voice input, sound detection, audio sampling, voice recognition or smart device interaction. It is commonly used in ESP32 voice assistant projects, IoT sound monitoring systems, smart home devices, robotics, audio recording experiments and school electronics projects.

Unlike ordinary analog microphone modules, the INMP441 outputs digital audio, which helps reduce noise and improves signal quality when working with supported microcontrollers. Its compact size and low power consumption make it suitable for battery-powered and portable projects.

For ESP32 users, this module is one of the best options for building voice-controlled systems, audio detection projects and AI/IoT voice input applications. It is also useful for STEM learners, electronics hobbyists, facilitators and project builders working on modern embedded audio systems.

Key Features:

• Digital I2S audio output
• High-performance MEMS microphone
• Omnidirectional sound capture
• Suitable for ESP32 voice projects
• Low power consumption
• Compact module size
• Better signal quality than many analog microphone modules
• Ideal for voice recognition and sound detection
• Suitable for IoT, robotics and smart home projects

Technical Specifications:

• Microphone Type: MEMS digital microphone
• Interface: I2S
• Output: Digital audio
• Data Resolution: 24-bit
• Supply Voltage: 1.8V to 3.3V
• Typical Current Consumption: 1.4mA
• Signal-to-Noise Ratio: 61 dBA
• Sensitivity: -26 dBFS
• Frequency Response: 60 Hz to 15 kHz
• Pickup Pattern: Omnidirectional
• Compatible Boards: ESP32 and other I2S-supported microcontrollers

Pin Description:

• VCC: Power supply
• GND: Ground
• SCK: I2S serial clock
• WS: Word select / left-right clock
• SD: Serial data output
• L/R: Left or right channel selection

Applications:

• ESP32 voice recognition projects
• Voice assistant projects
• Smart home control systems
• IoT sound monitoring
• Audio recording experiments
• Robotics voice input
• Sound-activated systems
• Noise detection projects
• Embedded audio processing
• STEM and school electronics projects

Recommended For:

• ESP32 projects
• Arduino audio experiments with I2S-supported boards
• Voice-controlled devices
• AI voice input systems
• IoT audio monitoring
• Smart shower voice control projects
• Home automation projects
• Robotics and embedded systems

Important Note:
The INMP441 uses an I2S digital interface. It is best used with microcontrollers that support I2S, especially ESP32 boards. It is not a simple analog microphone module, so users must connect it correctly and use compatible I2S code or libraries.