MAX9812 Microphone Amplifier Sound Module MIC Voice Module 3-5V

The MAX9812 Microphone Amplifier Module is a high-performance audio sensing solution designed for precise voice capture and sound detection. Powered by the professional-grade MAX9812 amplification IC, this module is engineered to provide superior audio quality with significantly lower output noise compared to standard transistor-based microphone modules.

Professional Grade Amplification

At the heart of this module is the MAX9812, which provides a fixed gain of 20dB. This ensures that even faint sounds are amplified to a level that can be easily processed by the Analog-to-Digital Converters (ADC) of microcontrollers like Arduino, ESP32, or Raspberry Pi. Its high sensitivity and “clear” output make it an excellent choice for projects requiring more than just simple noise detection.

Ultra-Compact & Versatile

Measuring only 15mm x 9mm, this module is one of the smallest microphone amplifiers available, making it perfect for wearable electronics, hidden sensors, and space-constrained robotics. It supports a wide input voltage range of 3V to 5V, allowing it to interface seamlessly with both low-power 3.3V systems and standard 5V logic.

Key Features

• Professional IC: Utilizes the MAX9812 for low-noise, high-fidelity audio amplification.

• Fixed 20dB Gain: Provides consistent signal boosting without the need for manual potentiometer adjustments.

• High Sensitivity: Optimized for capturing human voice and ambient environmental sounds.

• Wide Voltage Range: Compatible with 3.3V and 5V power supplies.

• Analog Output: Outputs a continuous analog signal ready for MCU ADC pins.

• Miniature Design: Extremely small footprint for easy integration into any enclosure.

Technical Specifications

Feature	Specification
Main IC	MAX9812
Operating Voltage	3.0V – 5.0V DC
Output Type	Analog Signal
Fixed Gain	20dB
Signal-to-Noise Ratio	High (Low Noise Output)
Dimensions	15mm x 9mm
Sensitivity	Professional Grade

Typical Application Scenarios

• Voice Recognition: Providing clean audio input for the SYN6988 speech module or AI-based voice processing.

• Sound-Activated Systems: Building smart switches, “clapper” circuits, or security alarms.

• Robotics: Giving your 8DOF Humanoid Biped the ability to respond to voice commands or environmental noise.

• Audio Recording: Preamplifier for small voice recorders or transmitter circuits.

• Environmental Monitoring: Tracking noise levels in smart city or industrial IoT applications.

Package Includes

• 1 x MAX9812 Microphone Amplifier Module

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note

Signal Processing: This module provides an analog voltage output. To detect specific frequencies or complex voice patterns, you will need to perform FFT (Fast Fourier Transform) or use a software library on your microcontroller to process the raw analog data.