Table 1: The average SRT scores, PPD, and the subjective ratings for both levels of intelligibility and for both masker types.
IntelligibilityFluctuatingSingle talker
SRTSNR (SD), dB
 50%−11.2 (1.5)−12.6 (1.9)
 84%−5.7 (1.5)−6.0 (2.8)
PupilPPD (SD), mm
 50%0.23 (.16)0.29 (.16)
 84%0.16 (.12)0.22 (.16)
SubjectiveEffort (low = 0–high = 10)
 50%6.9 (1.5)6.7 (1.3)
 84%4.7 (1.7)5.3 (1.6)
 Performance (low = 0–high = 10)
 50%5.5 (1.4)5.4 (1.0)
 84%7.1 (1.0)6.9 (1.2)
 Motivation (low = 0–high = 10)
 50%8.0 (1.4)7.9 (1.7)
 84%8.6 (1.3)8.6 (1.3)