The Research of Time-Frequency Feature Extraction of Loudspeaker Acoustic Signal by Pre Emphasis in Time Domain

The analysis of loudspeaker response signal is one of the main methods of loudspeaker fault diagnosis. In this paper, the loudspeaker response signal is treated by the pre emphasis in time domain, and it is processed by short time Fourier transform. More evident time-frequency feature of fault loudspeaker is obtained than before pretreatment. It provides a more effective method to recognize and identify the fault loudspeakers.