Notes: Easy to recognize; look for an area of strong frication bounded between 3000-4000 and 8000 Hz. No glottal pulses.
A typical /s/ may look like:
Speaker: Tim Carmell
Word: the /s/ section of the word "aspire"
Speaker: Tim Carmell
Word: the /s/ section of the word "sign"
References:
Course Materials
Spectral Cues Front Page