Integrated Radar Motion Detection + 4-Mic AI Noise Reduction Array

Integrated Radar Motion Detection + 4-Mic AI Noise Reduction Array

This intelligent microphone array integrates millimeter-wave radar motion detection with a high-performance DSP-based 4-channel MEMS microphone system. The radar sensor detects object movement and automatically activates the microphone array, enabling low-power standby and smart voice pickup only when needed.

With dual-microphone directional pickup, deep-learning noise reduction, and 3–5m far-field voice capture capability, the module delivers up to 30dB noise suppression, ensuring clear voice recognition even in complex acoustic environments.

Ideal for smart home devices, interactive terminals, conference systems, AI speakers, and intelligent control panels.

1. Product Overview

The Radar-Triggered AI Microphone Array Module is a next-generation intelligent voice front-end solution that combines:

  • Millimeter-wave radar motion sensing

  • 4-channel MEMS microphone array

  • High-performance 32-bit DSP processor

  • AI-based beamforming & noise suppression

  • USB 2.0 full-speed digital audio interface

The radar unit continuously monitors movement in ultra-low power mode. Once motion is detected, the system automatically activates the microphone array and audio processing engine, enabling intelligent voice interaction while minimizing overall system power consumption.

This architecture is especially suitable for always-on smart devices requiring efficient energy management and responsive voice activation.

2. Core Technical Features

Radar-Based Motion Detection Trigger

  • Detects object movement in real time

  • Automatically activates microphone pickup

  • Reduces idle power consumption

  • Enhances system intelligence and user experience

4-Channel Synchronized MEMS Microphone Array

  • Strict channel synchronization

  • Digital PCM output

  • High SNR audio capture

  • Optimized for beamforming and direction estimation

AI Deep Learning Noise Reduction

  • Up to 30dB noise suppression

  • Real-time separation of human voice and background noise

  • Effective static & dynamic noise cancellation

  • Improved speech recognition accuracy

Far-Field Voice Pickup

  • 3–5 meter voice capture distance

  • Accurate voice recognition

  • Fast response time

 High-Performance DSP Processor

  • 32-bit RISC core

  • Up to 320 MHz

  • Integrated floating-point unit (FPU)

  • Optimized DSP instruction set

  • Built-in audio ADC & DAC

USB 2.0 Standard Protocol

  • Plug-and-play integration

  • Compatible with Android / Windows / Linux

  • Supports secondary development

3. Audio Processing Capabilities

The module integrates advanced audio front-end algorithms:

  • Beamforming

  • Noise suppression (NS)

  • Acoustic Echo Cancellation (AEC)

  • Dynamic Range Compression (DRC)

  • Parametric Equalizer (EQ)

  • Anti-howling frequency shift

  • Wind noise elimination

  • Virtual bass enhancement

Independent 4-channel digital microphone outputs allow flexible host-side secondary algorithm development.

4. Electrical & Audio Specifications

  • Power Supply: 5V USB DC

  • Maximum Audio Bit Width: 16-bit

  • Supported Sample Rates:
    16kHz / 22.05kHz / 24kHz / 32kHz / 44.1kHz / 48kHz

  • Line Output: 2-channel

  • SNR: ≥105dB

  • Directly drives 16Ω / 32Ω headphones

  • Integrated USB PHY

5. Acoustic Performance

With directional beamforming and AI noise reduction:

  • Clear voice extraction in noisy environments

  • Effective separation of human speech from mechanical noise

  • Superior performance in smart terminals and interactive devices

Noise suppression technology significantly improves voice clarity compared to traditional omnidirectional microphone systems.

6. Application Scenarios

This integrated radar + microphone array solution is ideal for:

  • Smart home control panels

  • AI voice assistants

  • Intelligent speakers

  • Smart display terminals

  • Conference systems

  • Industrial voice control devices

  • Security and monitoring systems

  • Touchless interactive kiosks

7. Mechanical & Design Guidelines

For optimal acoustic performance:

  • Avoid placing microphones directly facing speakers

  • Keep away from cooling fans

  • Recommended acoustic opening: 0.8–1.5mm

  • Seal microphone and panel with EVA or silicone

  • Ensure no acoustic leakage between mic and panel

Proper structural design significantly impacts final sound performance.

8. Reliability & Compliance

  • RoHS compliant & halogen-free materials

  • Thermal shock: -40℃ to +100℃

  • High temperature bias: +125℃

  • Humidity test: 85℃ / 85% RH

  • Mechanical shock: 10000g

  • ESD protection: ±2KV contact / ±4KV air

Designed for industrial-grade reliability.

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