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Mean deviations (in dB) of hearing aid gain measured in HA2-2cc coupler from prescriptive gain targets at each frequency for low (50 dB SPL), medium (65 dB SPL), and high (80 dB SPL) input levels.
| Frequency (Hz) | |||||||
|---|---|---|---|---|---|---|---|
| Input level | 250 | 500 | 1000 | 2000 | 3000 | 4000 | |
| Low (50 dB SPL) | Mean | −2.0 | −1.4 | −1.2 | 0.8 | −1.7 | −0.9 |
| SD | 4.2 | 3.8 | 3.5 | 3.7 | 4.1 | 4.6 | |
| Medium (65 dB SPL) | Mean | −0.9 | −0.1 | 0.0 | −0.1 | −2.0 | −1.0 |
| SD | 3.6 | 3.3 | 3.1 | 3.3 | 4.1 | 4.7 | |
| High (80 dB SPL) | Mean | −1.7 | −0.5 | 0.5 | 0.9 | 0.1 | 1.0 |
| SD | 4.3 | 3.4 | 3.4 | 3.6 | 4.8 | 5.1 | |
