Critical Bands of Sound Perception
for pure tone of some frequency, nerve cells of the
basilar membrane are excited over a small region.
approx 30 regions each covering about 1/3 octave
Adding more sound in a different band causes
much more increase in subjective loudness than
adding sound in the same band.
Subjective loudness of complex tones is measured in
SONES (see Fig 4, page 99 Backus to find SONES from
Phones. Difficult and subjective - when are tones judged
ìtwice as loudî?
demo:
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