Table 3.

Mean just-noticeable differences for Gujarati, Thai, and English-speaking listeners in the different listening conditions. Standard deviations are given in parentheses.

	Gujarati listeners	Thai listeners	English listeners
Spectral slope
Slowly falling	2.73 dB (1.85 dB)	4.43 dB (2.03 dB)	3.87 dB (2.04 dB)
Steeply falling	2.47 dB (1.76 dB)	2.91 dB (1.20 dB)	2.83 dB (1.54 dB)
NHR
High (+ noisy)	2.97 dB (1.92 dB)	3.80 dB (1.82 dB)	3.50 dB (1.91 dB)
Low (− noisy)	2.23 dB (1.60 dB)	3.55 dB (1.84 dB)	3.20 dB (1.84 dB)