TABLE VII.

Effects of Vowel Level and S/N on Behavioral Thresholds.

Vowel Level	S/N	Cat BU	Cat PO	Cat TU	Mean (SE)
31 dB SPL	23	58.1	83.4	34.6	58.9 (14.2)
	13	61.2	92.0	77.0	76.8 ( 8.9)
	3	77.9	78.2	92.0	82.7 ( 4.7)
51 dB SPL	23	60.3	53.5	29.1	47.6 ( 9.5)
	13	50.7	71.6	45.1	55.8 ( 8.1)
	3	70.4	92.9	85.9	83.1 ( 6.7)
71 dB SPL	23	45.4	61.8	25.2	44.1 (10.6)
	13	39.8	41.9	37.7	39.7 ( 1.1)
	3	79.2	81.4	96.0	85.6 ( 5.3)