Equivalent Rectangular Bandwidth
This is the effective bandwidth of an auditory filter.
The ERB number z is the number of ERBís above 0Hz and is the Cambridge equivalent to the Bark scale of critical band rate.
ERB is used by the Cambridge School (Moore). Note that ERBís are narrower than Barkís with 38 in the complete hearing range as compare to 24 in the Bark range.
See also: Bark.