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Dear all,
The idea that the size of critical bands (CB)
is similar along the audible spectrum and that their number could thus be
estimated has never been based on evidence.
For more than 25 years there is evidence,
however, that the CBs have their structural and functional basis in the auditory
midbrain. Their number could as yet not be determined in any animal, but their
size varied widely around 4 semitones.
C. E.
Schreiner, G. Langner: Laminar fine structure of frequency
organization in auditory
midbrain. In: Nature vol 388, nr
6640, 383–386, doi:10.1038/41106
M. Egorova, G.
Ehret: Tonotopy and inhibition in the midbrain inferior
colliculus shape spectral resolution of sounds in neural critical
bands. In: The European journal of
neuroscience, vol 28, nr 4, 2008, 675–692, doi:10.1111/j.1460-9568.2008.06376.x
M. S. Malmierca, M. A.
Izquierdo, S. Cristaudo, O. Hernández, D. Pérez-González, E. Covey, D. L.
Oliver: A discontinuous tonotopic organization in the
inferior colliculus of the
rat. In: The Journal of
neuroscience, vol 28, nr 18, 2008,
4767–4776, doi:10.1523/JNEUROSCI.0238-08.2008
Greetings,
Martin
Braun
From: David
Jackson Morris
Sent: Wednesday, September 13, 2023 4:59 PM
Subject: Number of critical bands in human
hearing? Dear all, In teaching an undergrad course on hearing
science the students have asked, how many critical bands are there in normal
healthy hearing? The text that we use says that there are 24. If I
ask ChatGPT it also cites Fletcher and Munson’s estimation of 24, but what would
it know. . . Am I right in suspecting that this may have
been revised upwards at some stage (?). Is the collective wisdom of the
list able to help with this or point to an authoritative source?
Cheers David |