Reverberation Removal in Electronic Devices Using MVDR Beamforming

The patent divides the single microphone system into multiple microphone units arranged in a specific geometric configuration. By segmenting the acoustic capture function across multiple spatially distributed microphones, the system achieves better directionality and reverberation separation capability while maintaining manageable device complexity through structured arrangement.

The patent transitions from a single-point microphone measurement to a spatially distributed microphone array, adding the spatial dimension to the acoustic measurement. This dimensional expansion enables the system to exploit spatial differences in reverberation paths and achieve superior reverberation removal through beamforming and spatial filtering techniques.

The patent performs preliminary acoustic calibration and impulse response measurement during device manufacturing or initial setup. By pre-characterizing the acoustic environment and storing reference data, the system reduces the complexity of real-time reverberation removal processing, as the computationally intensive characterization steps are completed in advance.

The patent replaces complex mechanical/acoustic solutions (such as physical acoustic treatment or multiple processing passes) with optimized signal processing algorithms that operate efficiently on the captured audio data. The use of closed-form solutions and pre-computed filters substitutes for more computationally demanding iterative or mechanical approaches.