Table 1.

Parameters extracted from the response areas

Parameter number	Description	Units
1	Variation of the BF as a function of sound level	ERBs dB−1
2	Variation of the width of the response with sound level	ERBs dB−1
3	Average width of the response area (based on standard deviation of isolevel functions)	ERBs
4	Normalised maximum firing rate below CF
5	Normalised maximum firing at CF
6	Normalised maximum firing above CF
7	Sound level relative to threshold at which maximum firing rate occurs below CF	dB
8	Sound level relative to threshold at which maximum firing rate occurs at CF	dB
9	Sound level relative to threshold at which maximum firing rate occurs above CF	dB
10	Slope of the normalised rate level function between threshold and peak below CF	dB−1
11	Slope of the normalised rate level function between threshold and peak at CF	dB−1
12	Slope of the normalised rate level function between threshold and peak above CF	dB−1
13	Monotonicity below CF: ratio of the maximum of the rate level function to the rate at the highest sound level at CF
14	Monotonicity at CF: ratio of the maximum of the rate level function to the rate at the highest sound level below CF
15	Monotonicity above CF: ratio of the maximum of the rate level function to the rate at the highest sound level above CF
16	Difference between the normalised maximum firing rate at and above CF
17	Difference between the normalised maximum firing rate at and below CF
18	Difference between the normalised maximum firing rate above and below CF