Table 2. Summary of Multivariate Regression Analysis.

		Proportion Variation %
		Quiet	10 dB SNR	5 dB SNR	0 dB SNR
R2		86.0*	84.2*	80.2*	68.2*
η2	PK	−80.1	41.3	32.2	25.5
	FT	2.5	23.6	23.5	21.8
	PK×FT	3.4	19.3	24.5	22.3
Standard error		10.1	12.1	10.6	9.6
Coefficient	PK	−5.6*	−3.6*	2.2*	−2.1*
	FT	−51.88	−219*	−163*	−42*
	PK×FT	−12.7	−46.33*	−35.6*	−8.9*
	Constant	−8.7	−18.8*	−21.1*	−21.9*

^*p<0.01.

PK: Peak Sensitivity obtained in TMTF.

FT: FMDLs at 0.5 kHz for 2 Hz modulation frequency.

PK×FT: Interaction between PK and FT.