TABLE 1.

Age and hearing thresholds (mean ± SD) at each frequency from 0.25 to 4 kHz for the moderate, moderate to severe, and severely hearing-impaired listeners

	Age (years)	Ear	0.25 kHz	0.5 kHz	1 kHz	2 kHz	4 kHz
Moderate (5M, 3F)	19.1 ± 6.3	R	37.5 ± 5.3	42.5 ± 5.3	51.3 ± 5.2	56.3 ± 6.4	55.6 ± 6.8
		L	35.6 ± 5.6	41.3 ± 3.5	51.3 ± 4.4	55.6 ± 3.2	56.9 ± 5.9
Moderate to severe (7M, 6F)	25.2 ± 15.0	R	52.3 ± 9.9	55.8 ± 7.6	62.7 ± 6.3	66.2 ± 4.6	64.6 ± 5.6
		L	50.0 ± 8.7	53.8 ± 7.9	63.1 ± 4.8	64.6 ± 6.3	66.2 ± 5.8
Severe (8M, 2F)	18.1 ± 4.3	R	68.0 ± 6.7	72.5 ± 3.5	73.0 ± 7.1	79.0 ± 10.7	78.0 ± 11.4
		L	66.5 ± 9.7	69.5 ± 7.6	75.0 ± 5.8	80.5 ± 8.6	76.0 ± 9.4