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

Claim 4:
5. The method according to claim 3, wherein m wind turbine blades are disposed on the wind power generation device, where m is a positive integer; and
calculating the frequency domain factor of the sound signal based on the signal peaks of the n frequency spectrum regions comprises:
acquiring a maximum peak from signal peaks of each two adjacent frequency spectrum regions of m frequency spectrum regions and determining the maximum peak as a candidate peak, where m is a positive integer; and determining a median of at least two of the candidate peaks as the frequency domain factor; or
calculating a relative entropy between signal distribution and theoretical distribution in the segmented frequency spectrogram, and determining the relative entropy as the frequency domain factor.