INMP441 MEMS Omnidirectional Microphone Module High-Precision I2S Digital Microphone for ESP32, Raspberry Pi & Audio Processing Projects

Technical Specifications

• Model: INMP441
• Microphone Type: MEMS Omnidirectional Digital Microphone
• Interface: I2S (Inter-IC Sound)
• Supply Voltage: 1.8V – 3.3V
• Current Consumption: < 1 mA
• Signal-to-Noise Ratio (SNR): 61 dB
• Frequency Response: 60 Hz – 15 kHz
• Output Format: 24-bit I2S
• Directionality: Omnidirectional
• Maximum SPL: 120 dB
• Clock:
  • Master Clock (MCLK): Not required
  • Supported: BCLK, LRCLK
• Compatibility: ESP32, Raspberry Pi, STM32, Arduino (with I2S support)
• Operating Temperature: -40°C to +85°C
• Applications:
  • Voice recognition systems
  • AI assistants & smart speakers
  • Audio recording & streaming
  • DSP & FFT sound analysis
  • Environmental noise monitoring
  • IoT sound-based projects
  • Wake-word detection

Technical Description

The INMP441 MEMS Digital Microphone Module is a high-precision, low-noise, omnidirectional microphone designed for audio capturing, voice recognition, sound detection, and DSP applications. Featuring an I2S digital interface, it provides crystal-clear audio output without the need for an ADC, making it an excellent choice for microcontrollers like ESP32, Raspberry Pi, ARM Cortex boards, and IoT devices.

With a compact MEMS design, ultra-low power consumption, and an excellent signal-to-noise ratio (SNR), the INMP441 is ideal for AI voice projects, smart speakers, audio analysis, DIY sound recording devices, and environmental monitoring.