Patent ID: 11905926
Assignee: SHANGHAI ENVISION DIGITAL CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 2:
3. The method according to claim 2, wherein the segmented frequency spectrogram comprises frequency spectrum regions of n wind turbine blades after segmentation, where n is a positive integer; and
calculating the sound spectrum difference factor in response to the impingement of the wind on the wind turbine blade based on the segmented frequency spectrogram comprises:
extracting signal peaks in n frequency spectrum regions;
calculating a time domain factor and a frequency domain factor of the sound signal based on the signal peaks of the n frequency spectrum regions; and
determining a weighted average of the time domain factor and the frequency domain factor as the sound spectrum difference factor.