A.J. Aranyosi wrote:
Band 1: 0 - 300 Hz
Band 2: 300 - 630 Hz
Band 3: 630 - 1080 Hz
Band 4: 1080 - 1720 Hz
Band 5: 1720 - 2700 Hz
Band 6: 2700 - 4400 Hz
Band 7: 4400 - 7700 Hz
Band 8: >7700 Hz
What you'll notice here is that the bands are smaller at lower
frequencies - i.e., it's easier for us to tell the difference between
300 and 400 Hz than the difference between 8300 and 8400 Hz.
Actually, the bands are wider at the low and high ends, and narrower in
the middle. You're comparing them linearly, but frequencies should
always be compared logarithmically. The important number is
band-top/band-bottom -- ie: how many octaves wide is the band:
band 1: infinite (or 15, assuming 20Hz min range)
band 2: 2.1
band 3: 1.71
band 4: 1.59
band 5: 1.57
band 6: 1.63
band 7: 1.75
band 8: infinite (or 2.60 assuming 20kHz max range)
This makes good sense -- we hear better at the center of our hearing
range than we do at either extreme.
- Marc
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