TABLE 2.

Average (± 1 SD) absolute differences between measured and target gain at six frequencies (kHz) for input levels of 50, 65, and 80 dB SPL for 2 cc coupler gain and real ear gain

Frequency (kHz)	2 cc Coupler Gain			Real Ear Gain
Frequency (kHz)	50 dB	65 dB	80 dB	50 dB	65 dB	80 dB
0.5	2.6 (1.9)	2.1 (2.1)	3.4 (2.6)	3.7 (2.9)	2.6 (2.1)	2.1 (1.6)
1.0	2.2 (1.7)	1.9 (1.4)	2.1 (1.6)	2.6 (2.4)	2.3 (1.7)	2.8 (2.0)
2.0	2.5 (1.7)	1.4 (1.1)	2.1 (2.0)	4.3 (3.2)	4.2 (3.5)	3.6 (2.5)
3.0	1.4 (1.2)	3.1 (1.7)	3.0 (2.1)	2.5 (2.0)	3.5 (2.7)	3.0 (2.0)
4.0^*	1.5 (1.2)	2.3 (1.6)	2.5 (1.7)	3.4 (2.7)	4.8 (3.1)	2.9 (2.3)
5.0^*	3.7 (2.5)	2.2 (2.1)	3.2 (2.4)	5.5 (4.0)	6.7 (4.4)	6.8 (4.0)

Target gain values were not prescribed for all subjects.