Method, device and system for obtaining airspace filter parameter matrix

The embodiments of the invention relate to the technical field of data processing and particularly disclose a method, device and system for obtaining an airspace filter parameter matrix. The method comprises the steps that a first pointing matrix under first sub-band frequency is determined according to a pre-obtained first sub-band frequency matrix under the first sub-band frequency, the pre-obtained number of microphones, the pre-obtained position where each microphone is located, and the pre-obtained angle corresponding to the position where each microphone is located; numerical values of elements in a constraint matrix are determined according to the angle corresponding to the position where each microphone is located, wherein the number of the elements in the constraint matrix is thesame as that of the microphones; and the airspace filter parameter matrix under the first sub-band frequency is determined according to the constraint matrix and the first pointing matrix. In this way, it can be further ensured that a microphone array receives sound in the preset direction while small-interval arrangement of the microphone array is met, and voice enhancement is realized.