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window

A fixed run of consecutive samples treated as one unit, such as one second of readings.

A window is N consecutive samples from which features are computed; its length sets frequency resolution (f_s/N), feature noise, reaction time and memory.

Examples

  • The fan's window is N = 100 samples, one second at 100 Hz, and every feature is computed once per window.

  • A 1 s window on a fan turning at about 23 Hz holds about 23 turns and gives 1 Hz frequency detail.

See also

hop feature feature vector
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