M40D 4-microphone directional array
M40D combines a high-precision 4-microphone directional array with a high-definition autofocus camera (up to 12MP). Designed for seamless AI integration, it isolates speech, eliminates ambient noise, and captures crisp visual detail—making it the ideal front-end solution for digital humans, smart kiosks, and large-screen displays.
Key Highlights
- 60° Beamforming Pickup
- Embedded Audio Suite
- Flexible Resolution Options
- High Frame Rate Performance
- Versatile Field of View
Overview & Technical Details
Design, key features, typical applications, and core specifications.
Product Overview
The M40D is an all-in-one AI voice and video front-end solution crafted specifically for interactive smart terminals. By pairing a high-performance 4-mic directional array microphone with a 5MP/8MP/12MP HD camera, the M40D guarantees both exceptional voice recognition accuracy and brilliant image quality.
Equipped with a next-generation DSP processor and deep neural network (DNN) audio algorithms, the unit suppresses ambient room noise and eliminates local echo—enabling smooth real-time barge-in / interactive interruption during conversations with AI agents or digital employees.
Core Features & Technologies
60° Beamforming Pickup:
Creates a tight directional audio beam, effectively filtering out environmental noise.
Embedded Audio Suite:
Includes Active Echo Cancellation (AEC), Automatic Gain Control (AGC), Noise Suppression, and Speech Enhancement.
Flexible Resolution Options:
Choose between 5MP, 8MP, or 12MP sensor configurations depending on your system requirements.
High Frame Rate Performance:
Supports 1080P at smooth 60FPS, or full 12MP high-res imaging (4000×3000 @ 15fps).
Smart Image Tuning:
Includes Automatic White Balance (AWB) and Phase Detection Autofocus (PDAF) for fast, stable, and ultra-clear visual framing.
Versatile Field of View:
Features a standard wide-angle view (up to 72°) and 45° up/down mechanical tilt rotation for easy physical adjustment.
Target Applications
Virtual & Digital Human Terminals: Ideal for AI digital employees, virtual customer service avatars, and smart receptionists.
Smart Kiosks & All-in-One Machines: Government self-service terminals, healthcare kiosks, and banking hardware.
Interactive Digital Signage: OLED transparent displays and large-screen interactive installations in high-traffic environments.
Indoor AI Intercoms & Recording: Clear video conferencing and voice-controlled indoor systems.
Microphone specifications
| Microphone type | MEMS digital microphone |
| Number of digital wheat | 4 MIC |
| The farthest pick-up distance | Best within 3 meters |
| Audio capture rate | 48KHz @16bit, Stereo |
| Sensitivity | -26±1dB |
| SNR | 65 dB (A) |
| AOP | ≥12dB SPL |
| Noise reduction | ≥20dB |
| Directivity | Forward and backward 60 degrees pickup |
| Supporting function | The sound of man is enhancedBeam-formingDirectional pick up soundNoise SuppressionAutomatic Gain Control |
| Hardware characteristics | 60 directional pickupSupport USB Audio Class 1.0 (UAC 1.0)Support speaker amplifier output (4 Ω5W)Linear 4-channel microphone arraySupport HUB to connect camera devices |
| Interface | USB2.0 |
| USB power supply voltage | 5V+5% |
| Power Consumption | Regular work : 1W5V, 160mA (Max) |
5MP camera specifications
| photosensitive chip | CMOS1/4′ |
| Pixel Size | 1.4 umx 1.4 um |
| SNR max | 34dB |
| Max Dynamic range | 67dB |
| Minimum illumination | 0.1Lux at F12 |
| F/NO | 2.4 |
| EFL | 2.8mm |
| FOV | 73° |
| IR | 650±10nm |
| Lens Construction | 4P+IR |
| Maximum resolution and frame rate | 2592*1944 (15ps) |
| Other optional resolution ratio | 640*480 (30fps)、800*600(30fps)1280*720 (30fps)、1280*960(30fps)1920*1080 (30fps) 、1600*1200(15ps) |
| Support format | YUV/MJPG |
| USB power supply voltage | 5V士5% |
| Connect the interface | 1*USB-5pin-1.0mm |
| Interface speed | 480mb/s |
| Operating system request | Win XP 、 Win 7 Linux or Vista and android4.1 |
| Power Consumption | Regular work : 0.9W |
| storage temperature | 0°C to 50°C |
| working temperature | -10°C to + 60° |
| structure size | (L)60mm x (W) 9mm x (H) 5.9mm |
8MP camera specification
| photosensitive chip | CMOS1/3.2” |
| Pixel Size | 1.4 umx 1.4 um |
| SNR max | TBD dB |
| Max Dynamic range | TBD dB |
| Minimum illumination | 0.1Lux at F12 |
| F/NO | 2.2 |
| EFL | 3.05mm |
| FOV | 90° |
| IR | 650±10nm |
| Lens Construction | SP+IR |
| Maximum resolution and frame rate | 3264*2448 (15fps) |
| Other optional resolution ratio | 640*480(30fp)、848*480(30fps)960*540(30fps)、1280*720(30fps)、1600*1200(30fps)、1920*1080 (30fps)、2592*1944 (15fps) |
| Support format | YUV/MJPG |
| USB power supply voltage | 5V士5% |
| Connect the interface | 1*USB-5pin-1.0mm Sleeping tape |
| Interface speed | 480mb/s |
| Operating system request | Windows XP/ VISTA/Win7/Win8/Win10/Linux 2.6.24. Ubuntu, Mac OS 10.6 and , Android5.1and Above version |
| Power Consumption | Regular work : 0.7W |
| storage temperature | 20°C to+ 60°C |
| working temperature | -10°C to + 60° |
| structure size | (L)60mmx (W ) 9mmx (H )7.0mm |
12MP camera specifications
| photosensitive chip | CMOS 1/2.5“ |
| Pixel Size | 1.4 umx 1.4 um |
| SNR max | TBD dB |
| Max Dynamic range | TBD dB |
| Minimum illumination | 0.1Lux at F12 |
| F/NO | F1.8±5% |
| EFL | 4.74mm |
| FOV | 72° |
| IR | 650IR |
| Lens Construction | 6P+IR |
| Maximum resolution and frame rate | 4000*3000 (15fps) |
| Other optional resolution ratio | 640*480(30fps) 、800*600(30fps)1280*720 (30fps)、1920*1080(60fps)1600*1200(30fps) 、2048*1536(30fps)2592*1944(30fps)、3840*2160(30fps) |
| Support format | YUV/MJPG |
| USB power supply voltage | 5V士5% |
| Connect the interface | 5PIN 1.OMM |
| Interface speed | 480mb/s |
| Operating system request | Windows XP/ VISTA/Win7/Win8/Win10/Linux 2.6.24. Ubuntu, Mac OS 10.6 and , Android5.1and Above version |
| Power Consumption | Regular work:0.9W |
| storage temperature | -20°C to+ 70°C |
| working temperature | -10°C to+ 65°C |
| structure size | (L) 70mm x (W) 11mm x (H) 7.7mm |
