Table 2.

Mean deviation of four-frequency-average gain (averaged between 0.5 and 4 kHz) measured in users’ hearing aids compared to prescriptive targets for 3 groups of hearing-aid fittings (User gain minus target gain). Deviations are shown for low (50 dB SPL), medium (65 dB SPL) and high (80 dB SPL) input levels. Also shown are standard deviations (SD) and range (Min–Max).

Group		Input level
		Low	Medium	High
DSL v4.1 (n = 35)	Mean	−0.1	−1.5	−1.1
	SD	2.2	2.1	2.7
	Min-Max	−9.0 to 3.3	−8.5 to 1.5	−11.0 to 2.7
DSL m[i/o] (n = 57)	Mean	−0.3	−0.8	−1.0
	SD	2.1	2.5	3.0
	Min-Max	−9.0 to 2.8	−10.0 to 4.5	−9.5 to 4.5
NAL-NL1 (n = 108)	Mean	−0.2	0.4	0.9
	SD	2.2	1.9	2.2
	Min-Max	−7.5 to 5.3	−8.5 to 6.3	−10.3 to 6.8