> sources. I not only notice minute amounts of distortion but
> find myself getting headaches quickly if there is too much
> 'pink' noise from excessive high frequency content.
Actually, pink (or 1/f, or flicker) noise has a lower high frequency content
(relatively) than "white" noise.
White noise has the same energy at every frequency. Pink noise has the same
total energy in every octave.
For example, pink noise will have as much energy in the 10000 to 20000 Hz
range as it has in the 100 to 200 Hz range, or the 1000-2000 Hz range.
Using 1 Hz as an arbitrary unit of measure for example purposes, there are
100 "frequencies" between 100 and 200 Hz and 12800 frequencies between 12800
and 25600 Hz. Since in white noise, the noise energy at each of those
frequencies is the same, white noise will have (relatively) a lot more
energy in the higher range than the lower. In fact, white noise has 3dB
more energy per octave than pink noise. In this example, the white noise
will have 18 dB more energy in the 12.8-25.6K range than pink noise.
It's why waves "crash" and don't have relatively much "rumble", which might
be more like what they sounded like if they generated pink instead of white
noise ...
Which doesn't mean there isn't also a reason to reduce the high frequency
content of pink noise, either, to please the ear.
More than you wanted to know, I'll bet :-)
Grant/NQ5T
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