TABLE II.

Threshold in quiet (dB SPL) and amount of masking (dB) in each filtered noise is shown for individual children <7 years, children >7 years, and adults. The age of each listener is given in years. The masker was played continuously. The group average estimates and ± one standard deviation (SD) are also listed.

		Amount of masking (masked-quiet threshold in dB)
Listener (age in years)	Quiet threshold (dB SPL)	4000–10 000 Hz (8.2 ERB)	4000–4075 Hz (0.2 ERB)	8000–8075 Hz (0.1 ERB)	425–500 Hz (1.0 ERB)
Children <7 years
4.4	14.39	16.83	15.66	10.83	8.11
5.3	8.00	2.83	5.33	2.83	3.50
5.5	9.50	−1.00	−2.50	−1.67	−3.17
5.9	2.67	2.17	−0.50	0.67	0.83
6.0	8.33	1.83	0.00	2.33	1.33
6.4	10.50	0.84	0.50	1.17	1.34
6.6	9.50	−0.33	0.34	3.17	0.84
6.8	10.00	1.61	−2.94	−3.17	4.33
6.8	6.83	0.83	1.50	−0.50	0.00
Mean	8.86	2.85	1.93	1.74	1.90
(SD)	(3.14)	(5.38)	(5.68)	(4.01)	(3.15)
Children >7 years
7.0	7.42	0.50	0.50	−0.33	1.01
7.1	1.50	1.00	2.83	2.00	0.17
7.2	7.50	3.61	0.44	1.83	1.56
7.8	10.00	−0.33	0.66	−0.95	1.84
7.8	7.39	−2.89	−4.72	−2.56	−5.39
7.9	11.33	2.39	5.39	0.55	3.17
8.4	4.50	−1.67	0.17	0.67	0.00
8.5	5.17	13.67	2.39	0.17	0.34
8.7	1.17	1.83	0.17	0.83	−3.50
8.7	13.33	1.17	1.67	1.17	3.17
Mean	6.93	1.93	0.95	0.34	0.24
(se)	(3.97)	(4.54)	(2.58)	(1.36)	(2.75)
Adults
19.1	2.67	1.50	2.50	3.17	3.17
19.2	−2.84	3.34	2.34	3.17	0.17
19.7	8.17	2.00	1.17	2.33	2.83
19.8	14.67	1.00	0.34	−1.33	−0.33
21.9	12.17	−3.33	−1.34	0.84	−1.67
22.5	3.17	0.50	0.67	−0.33	−2.11
24.2	9.50	−2.67	0.17	−2.50	−1.84
24.8	9.17	−1.17	2.17	0.28	0.17
25.6	2.50	−0.34	−0.17	1.00	1.83
29.5	3.84	1.50	0.50	2.00	2.17
Mean	6.30	0.23	0.84	0.86	0.44
(se)	(5.31)	(2.11)	(1.22)	(1.89)	(1.97)