107 results about "Sound source identification" patented technology

The invention discloses a double-measuring surface noise source identification system based on near field acoustic holography, and belongs to the technical field of vehicle noise source identification systems based on near field acoustic holography. The system includes a signal acquisition module, a data storage module, an analysis processing module and a result displaying module which are connected successively. The signal acquisition module is intended for determining array position, array element spacing, sampling frequency, and calibration of sampling number and microphones, and also for measuring sound pressure signals under all working stations. The data storage module is intended for storing the measured sound pressure signals and constructing a sound pressure signal database. The analysis processing module analyzes and processes the measured sound pressure signals by adopting the signal processing method. The result displaying module uses the double-measuring surface near field acoustic holography sound source identification algorithm to reconstruct a sound field so as to obtain a sound field distribution map and acquire sound source information. The system has strong suitability to measuring environments, can avoid the problems of tradition measuring methods, such as susceptibility to explicit influence from environment noise and low rate in identifying sound source.