TABLE III.

Mean differences in spectral amplitudes (envelope − TFS) in NH and HI groups, indicating significant differences between the hearing-impaired groups (unamplified and amplified) and the normal-hearing group.

	Unamplified [da] stimulus		Amplified [da] stimulus
	Normal Hearing Mean ΔHX in μV (S.D.)	Hearing Impaired Mean ΔHX in μV (S.D.)	Hearing Impaired Mean ΔHX in μV (S.D.)
Quiet
ΔF0	0.059 (0.027)	0.063 (0.048)	0.063 (0.058)
ΔH2	0.017 (0.030)	0.039 (0.038)	0.055 (0.038) b
ΔH3	0.009 (0.017)	0.028 (0.027) a	0.030 (0.016) b
ΔH4	−0.001 (0.015)	0.010 (0.022)	0.025 (0.014) c
ΔH5	0.000 (0.008)	0.009 (0.011) a	0.013 (0.009) c
ΔH6	−0.002 (0.006)	0.036 (0.007) a	0.002 (0.009)
Noise
ΔF0	0.055 (0.032)	0.057 (0.059)	0.060 (0.051)
ΔH2	0.019 (0.035)	0.054 (0.039) a	0.063 (0.040) b
ΔH3	0.008 (0.017)	0.024 (0.016) a	0.032 (0.017) b
ΔH4	−0.002 (0.019)	0.018 (0.015) b	0.020 (0.011) b
ΔH5	0.001 (0.010)	0.007 (0.011)	0.012 (0.009) b
ΔH6	0.000 (0.010)	0.001 (0.005)	0.004 (0.009)

^ap < 0.05.

^bp < 0.01

^cp < 0.001.