Table 1.
Benefit measures for speech in a quiet environment (improvement in %), speech in steady-state noise (improvement in dB SNR), and speech in fluctuating noise (improvement in dB SNR)
| Benefit measure | Mean | Standard deviation | Percentiles
|
|||||
|---|---|---|---|---|---|---|---|---|
| 10 | 25 | 50 | 75 | 90 | ||||
| Speech in quiet conditions (%) | 26.3 | 21.6 | 0.5 | 10 | 20 | 37.5 | 55 | |
| Speech in steady-state noise (dB SNR) | L50 | 0.74 | 1.36 | −0.58 | −0.2 | 0.5 | 1.0 | 2.44 |
| L80 | 0.79 | 2.02 | −1.20 | −0.40 | 0.35 | 1.90 | 2.83 | |
| Speech in fluctuating noise (dB SNR) | L50 | 2.60 | 2.22 | −0.20 | 1.53 | 2.65 | 3.83 | 4.55 |
| L80 | 2.81 | 2.34 | 0.14 | 0.78 | 2.65 | 4.20 | 4.97 | |
Notes: Means, standard deviations, and percentiles are given. L50, 50% speech recognition; L80, 80% speech recognition.
Abbreviation: SNR, signal-to-noise ratio.