Table 1.

Hearing capabilities of the four CBA mouse subject groups of the present investigation measured in dB SPL for ABR thresholds and DPOAE levels, adapted from Tadros et al. (2007a). H=hearing, L=loss, N=normal.

	Young NH-YC	Middle Age NH-MA	Old Mild HL-OM	Old Severe HL-OS
Low Frequency DPOAE (5-14 kHz)	17.40	18.76	7.69	-13.61
Mid Frequency DPOAE (15-29 kHz)	17.92	18.08	4.12	-19.43
High Frequency DPOAE (31-45 kHz)	11.26	8.52	-1.47	-21.95
3 kHz ABR	53.33	64.41	78.89	85.00
6 kHz ABR	26.11	33.24	58.33	73.33
12 kHz ABR	8.33	15.29	37.78	48.33
24 kHz ABR	14.44	21.47	45.00	66.67
32 kHz ABR	21.11	30.59	59.44	71.67
48 kHz ABR	25.00	35.29	67.78	73.33