Flattop Window

The Flattop window has negligible ripple (<0.01dB) in the passband. Thus it is designed mainly for calibration purposes. However, in most other cases one will prefer the Hanning weighting since it has 2.5 times narrower bandwidth, a higher real-time rate and it gives a uniform weighting achieved by simple overlap anlysis.

In the time domain this function is shown below:

The frequency response of this window is shown along with that of a rectangular window for comparison:

See also: Hanning Window, Windowing.

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Subjects: Noise & Vibration Signal Processing

Bruel & Kjaer - Technical Reviews These documents give detailed articles on measurement and signal processing theory.