NASA NTRS · 19710000275
A real-time statistical time-series analyzer
Abstract
Device extracts average frequency of human speech and produces second, third, and fourth moments of instantaneous frequency about this average. It operates on electrical time representation of input signal, performs statistical analysis on zero-crossing of almost any signal, and does not require specialized personnel to operate it.
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Stewart, C. H.. 1971-08-01. A real-time statistical time-series analyzer. https://ntrs.nasa.gov/citations/19710000275
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