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Unity Engine

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Unity Engine

Triangle

Triangular (Bartlett) window for FFT spectrum analysis.
読み終わるまでの所要時間 1 分最終更新 1ヶ月前

Definition

  • Type: Field
  • Namespace: UnityEngine
  • Assembly: UnityEngine.AudioModule
Triangle = 1

Remarks

Window function: 
W[n] = 1 - abs(2n/N - 1)
, 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 triangular window linearly tapers samples toward the edges of the block. It reduces leakage compared with FFTWindow.Rectangular with less taper than FFTWindow.Hanning or FFTWindow.Hamming. Use it as a middle ground when rectangular leakage is visible but a full raised-cosine window is not needed.
Additional Resources: FFTWindow, FFTWindow.Rectangular, FFTWindow.Hanning.