Which is the more important sense: sight or
sound? Those of us who spend our waking
lives working with audio have little doubt that
the aural dimensions of reality are more interesting than
the visual. And many in the video industry agree, if a little
backhandedly: One of the oft-repeated “truisms” heard
in video circles is “Television without picture is radio, but
television without sound is technical difficulties.” Not to
mention the variations on the end of that sentence floating
around, like “…furniture,” “…surveillance” or—my
favorite—“…unemployment.”
They all point to one thing: Grabbing the eyeballs may
be good for getting someone’s attention, but most of the
really important information coming from the television
set is going to your ears. By many measures, our hearing
is more acute than our sight: The range of our aural
perception (at least when we’re young) covers 10 octaves,
while our response to visible light barely covers one octave.
The dynamic range of the human ear is about 120
dB, and we can go from the lowest extreme of that range
to the highest pretty much instantaneously; the dynamic
range of the ocular system, taking into account both the
physical and chemical changes the eye undergoes to adjust
to varying light conditions—some of which can take
as long as several minutes—is a mere 60 dB.
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