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Unity Engine

BlackmanHarris

Blackman-Harris window for FFT spectrum analysis.
Read time 1 minuteLast updated 12 days ago

Definition

  • Type: Field
  • Namespace: UnityEngine
  • Assembly: UnityEngine.AudioModule
BlackmanHarris = 5

Remarks

Window function: 
W[n] = 0.35875 - 0.48829 * cos(2π * n/N) + 0.14128 * cos(4π * n/N) - 0.01168 * cos(6π * n/N)
, where 
n
is the sample index and 
N
is the window length.
Pass this value to the 
window
parameter of AudioListener.GetSpectrumData or AudioSource.GetSpectrumData. The window is applied before the FFT to reduce spectral leakage between frequency bins.
The Blackman-Harris window provides the strongest sidelobe suppression in this enum. Choose it when peaks must be well isolated and leakage from FFTWindow.Blackman is still too high. Expect the widest main lobe and the lowest frequency resolution of the listed windows.
Additional Resources: FFTWindow, FFTWindow.Blackman.