ROC-RK3308-CC Far-field Microphone Array Board is a 6 microphone expansion board for ROC-RK3308-CC designed for AI and voice applications. Including 6 digital microphones, 12three-color LEDs, 5keys, it supports keyword wakeup, echo cancellation and noise reduction, VAD (Voice ActivationDetection) and soundsource location etc., which can significantly improve the accuracy and precision of automatic speechrecognition. Module pattern: Circular Number of array element: 6 Module size: Diameter of 86mm Wakeup distance: > 20m Identification distance: > 5m Signal-to-noise ratio: SNR > 63dB Operating temperature: -20°C - 80°C Sound source location: Horizontal 360° Location accuracy: ±12° Support keyword wakeup, sound source location, noise suppression and VAD