Open Access
Table B.4.
One-third octave band sound power levels for speech after normalisation so that the on-axis sound pressure level at 1 m from the mouth is 60 dBA.
| One-third octave band (Hz) | Sound power level (dB re 10−12 W) | ||
|---|---|---|---|
| Average of six male talkers | Average of six female talkers | Average of six male and six female talkers | |
| 63 | 40.8 | – | – |
| 80 | 55.0 | – | – |
| 100 | 62.7 | 44.9 | 59.8 |
| 125 | 63.2 | 56.7 | 61.0 |
| 160 | 60.9 | 60.5 | 60.7 |
| 200 | 60.1 | 63.5 | 62.2 |
| 250 | 63.0 | 62.6 | 62.8 |
| 315 | 62.6 | 62.0 | 62.3 |
| 400 | 64.1 | 63.8 | 64.0 |
| 500 | 64.1 | 63.6 | 63.9 |
| 630 | 62.9 | 62.7 | 62.8 |
| 800 | 59.3 | 61.4 | 60.5 |
| 1000 | 57.1 | 58.8 | 58.1 |
| 1250 | 55.9 | 56.2 | 56.0 |
| 1600 | 54.2 | 54.4 | 54.3 |
| 2000 | 50.7 | 51.2 | 51.0 |
| 2500 | 51.5 | 50.1 | 50.8 |
| 3150 | 50.1 | 49.8 | 50.0 |
| 4000 | 50.0 | 48.0 | 49.1 |
| 5000 | 50.0 | 47.8 | 49.0 |
| 6300 | 50.2 | 49.7 | 50.0 |
| 8000 | 50.1 | 52.2 | 51.3 |
| 10 000 | 47.7 | 51.5 | 50.0 |
| 12 500 | 43.4 | 46.1 | 45.0 |
| 16 000 | 37.2 | 39.3 | 38.4 |
| 20 000 | 30.6 | 33.1 | 32.1 |
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