DSP Noise Reduction Dual Directional 4 Array Usb Conference Mic 3.5mm Audio Output
The M20 is a compact dual-directional 4-mic array microphone module from HAOKAI with both USB Type-C and 3.5mm analog audio output. DSP beam-forming and noise suppression deliver clear A/B role-separated voice capture for counters, translation booths, meeting rooms and smart terminal integration.
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M20 Dual Directional 4-Mic Array Microphone Module
The M20 from HAOKAI is a dual-directional independent pickup microphone module built on a 4-mic matrix array with DSP beam-forming, noise suppression and automatic gain control. It separates two speakers (A/B roles) on independent directional channels and outputs audio through both USB Type-C and 3.5mm analog interfaces - ideal for embedding into service counters, translation booths, meeting room systems, large display terminals and smart kiosks.
Key Features
- Dual Independent Directional Pickup: ≥60° bidirectional directivity separates A/B speakers for clear 1-on-1 dialogue capture while blocking off-angle voices by ≥12dB SPL.
- 4-Mic Matrix with DSP Algorithms: Beam-forming, voice enhancement, directional pickup, noise suppression (≥20dB) and AGC deliver broadcast-grade clarity.
- USB + 3.5mm Analog Dual Output: Flexible integration - digital USB Audio Class 1.0 and analog headphone/audio output from the same compact module.
- Hardware Controls: Physical pickup volume adjustment and one-key mute for instant operator control.
- Ultra-Compact Board Design: Main board only 38mm x 38mm with a 53mm x 6mm mic board - fits easily inside terminals and displays.
- Low Power USB Powered: 5V supply with 0.5W (100mA max) regular consumption.
- Clear Voice within 3m: 48kHz/16bit capture, 65dB(A) SNR, -26±1dB sensitivity.
- Proven Reliability: Temperature cycling, 100cm drop, vibration and ±8KV ESD tested.
Technical Specifications
| Item | Specification |
|---|---|
| Microphone Type | Dual directional independent pickup array, 4 MIC |
| Pick-up Distance | Best within 3m |
| Audio Capture Rate | 16kHz / 48kHz @ 16bit |
| Protocol | USB Audio Class 1.0 (UAC1.0) |
| Sensitivity | -26 ±1dB |
| SNR | 65dB(A) |
| Off-angle Voice Suppression | ≥12dB SPL |
| Noise Reduction | ≥20dB |
| Directivity | ≥60° (default) |
| Algorithms | Voice Enhancement, Beam-forming, Directional Pickup, Noise Suppression, AGC |
| Interface | 1 x USB Type-C + 3.5mm headphone/audio output |
| Power | USB 5V ±5%, 0.5W (5V, 100mA max) |
| Main Board Size | 38mm x 38mm |
| Mic Board Size | 53mm x 6mm |
| Working Temperature | -10 to +60°C |
| Storage Temperature | -20 to +70°C |
Applications
Government service counters • Counter A/B role voice separation • AI translation booths • Hotel and bank reception • Meeting rooms • Large display terminal voice interaction • Smart kiosks and self-service terminals
Integration & OEM Service
As a board-level module, the M20 is engineered for fast integration into terminals, kiosks and display devices. HAOKAI offers OEM/ODM support including cable, connector, acoustic tuning and firmware customization. Contact us for samples, datasheets and volume pricing.
