Table 2.
Distributions used for generating each profile. Ranges are displayed as start : step size : end. Note that gains marked with * indicate actual gain increases to the speech signal relative to 65 dB SPL, while for the other profiles it symbolizes a change in SNR relative to 65 dB SPL. SNR is applied by amplifying speech by half of the SNR and by attenuating noise by half of the SNR. A T60 of 0 s indicates an anechoic setting. The time courses of the parameter changes over time are also displayed in the results sections.
| Profile | SNR or Gain/dB | T 60/s |
|---|---|---|
| SNR only (S0N0) | −12:3:+12 | 0 |
| T 60 only (S0) | +6* | 0, 1, 3, 5 |
| SNR+T 60 (S0N0) | −12:3:+12 | 0, 1, 3, 5 |
| SNR only (S−45N+45) | −12:3:+12 | 0 |
| T 60 only (S−45) | +6* | 0, 1, 3, 5 |
| SNR+T 60 (S−45N+45) | −12:3:+12 | 0, 1, 3, 5 |
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