Allen,
When adjusting carbs (trying to be a human Uni-Syn), are we listening
to volume or pitch? My understanding is that hearing loss due to
exposure to rock concerts (or other loud things) always occurs in the
mid-frequencies, which is where consonants are in speech. Thus, a
former rock-and-roll devotee would hear only vowels in speech, and
presumably not hear lots of sharp clunks or hisses in their cars
either (might be a relief, actually). On the other hand, if an SU or
Stromberg at idle normally sounds like a vowel, we're still at least
able to balance our twin carbs.
Regards,
Jim Wallace
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Date: Fri, 20 Feb 1998 11:23:30 +1100 (EST)
From: Allen Nugent <A.Nugent@unsw.edu.au>
Hearing (and, to a lesser extent, vision) has a logarithmic, not
linear response to input power. This is so that we can detect sound
over a huge range. I would estimate the difference in power (the
square of volume) between a mosquito at 2 metres and a live band at 20
metres to be about 100 deciBels (a power ratio of 10,000).
Therefore, if you expect to balance carbs by ear to within, say, 10%,
you had better not have been to too many rock concerts (like me ...
bzzzzzzzzzzzz).
Allen Nugent
Graduate School of Biomedical Engineering
University of New South Wales
Sydney 2052 Australia
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