TABLE IV.
Model parameters, j and q, for IEC standard audiograms to account for the context effects in transforming predicted proportion keywords correct into proportion complete sentences correct for IEEE sentences in LTASS noise. The asymptotic values are estimated as the predicted intelligibility averaged over 25, 20, and 15 dB SNR. The conversion factor, q, compensates for the difference between the asymptotic values of the word and sentence predictions.
| Audiogram | Loss at 2 kHz (dB) | HASPI w2 asymptote | (HASPI w2 asymptote)3 | HASPI v2 asymptote | Exponent, j | Conversion factor, q |
|---|---|---|---|---|---|---|
| NH | 0 | 1.000 | 0.999 | 1.000 | 3.429 | 1.000 |
| N1 | 15 | 0.999 | 0.998 | 0.999 | 3.311 | 1.000 |
| N2 | 35 | 0.999 | 0.998 | 0.999 | 3.496 | 1.000 |
| N3 | 50 | 0.999 | 0.996 | 0.992 | 3.617 | 1.000 |
| N4 | 65 | 0.992 | 0.976 | 0.914 | 3.129 | 0.951 |
| N5 | 80 | 0.989 | 0.966 | 0.912 | 3.472 | 0.968 |
| N6 | 90 | 0.870 | 0.658 | 0.636 | 2.630 | 0.934 |
| S1 | 15 | 0.999 | 0.997 | 0.997 | 2.952 | 1.000 |
| S2 | 55 | 0.994 | 0.981 | 0.946 | 3.218 | 0.975 |
| S3 | 75 | 0.983 | 0.948 | 0.849 | 2.910 | 0.909 |