Distributed microphone array and sound source positioning system employing same

Abstract

The invention discloses a distributed microphone array. The array comprises a plurality of distributed microphone array nodes, wherein each microphone array node is provided with one or a plurality of microphone audio acquisition modules; each microphone array node is connected with an external signal processing unit through wireless network communication, and uploads an audio signal, which is unprocessed or has been subject to simple signal processing on the corresponding array node, to the corresponding signal processing unit. The distributed microphone array provided by the invention has the advantages that all the wireless microphone array nodes distributed in a wireless network form the large microphone array; in the wireless microphone array, microphone signal acquisition and transmission are based on the wireless mode, and microphone distribution is no more limited to physical sizes or cable connection, so that the distribution of a considerable number of microphones can be achieved, and the distances among the microphones and the coverage of the microphone array can be greatly enlarged.

Description

technical field [0001] The invention relates to a microphone array technology, in particular to a distributed microphone array and an applicable sound source localization system. Background technique [0002] Microphone array technology has important and extensive applications in the field of speech signal processing. Within the spatial range where voice signal collection needs to be performed, multiple microphones are arranged at different positions, that is, a microphone array is formed. [0003] Compared with the traditional single-microphone voice signal acquisition, the pickup range of the microphone array is greatly expanded. Depending on the size of the microphone array, the pickup range is extended from less than 0.5 meters to several meters, or even tens of meters; Using the signals collected by multiple microphones, the specific sound signal can be effectively enhanced in a noisy environment to achieve a good effect of suppressing noise; at the same time, directio...

AI Technical Summary

Problems solved by technology

The small-size integration method greatly limits the physical size of the microphone array, thereby limiting its sound pickup range and spatial diversity gain; the cable connection method of the large-pitch suspension microphone array increases the difficulty of the microphone's field layout, and the mixing The number of input ports of the frequency converter is limited, and the number of microphones is also limited, which limits the physical coverage of the array in practical applications.

Images