The invention discloses a near field sound source real-time
positioning system based on a
microphone array, belonging to the technical field of sound source positioning. The
positioning system comprises a
microphone array, an amplifying circuit module, a
signal acquiring and
processing module, a positioning result storage module and other
system assistance modules. Voice signals are amplified through the
microphone array, and the amplifying circuit adopts a special
microphone amplifier with an automatic
gain function as a core. The
signal acquiring and
processing module takes a DSP
chip with an on-
chip analog-to-
digital conversion function as a core, and adopts the direct storage access function in the DSP
chip. A near-field two-dimensional
broadband MUSIC
algorithm is further optimized, the acceptation or rejection of the
microphone array signal frequency spectrum sub-band is carried out, a sub-band matrix is subjected to MUSIC spectrum
estimation, the computation burden of DSP chip is reduced, and the
system instantaneity is improved. The sound source positioning result storage module adopts an SD card as a storage medium, the application range of the
system is improved, and thecluster chain of speaker position data is constructed by adopting a 'pre-built cluster chain method', so that the system instantaneity is improved.