Open Access
Table B.1.
One-third octave band sound pressure levels for speech on-axis at 1 m from the mouth when normalised to 60 dBA.
| One-third octave band (Hz) | Sound pressure level (dB re 2 × 10−5 Pa) | ||
|---|---|---|---|
| Average of six male talkers | Average of six female talkers | Average of six male and six female talkers | |
| 63 | 33.3 | – | – |
| 80 | 44.8 | – | – |
| 100 | 52.9 | 35.1 | 49.9 |
| 125 | 54.6 | 48.3 | 52.5 |
| 160 | 52.4 | 51.2 | 51.8 |
| 200 | 51.6 | 54.4 | 53.2 |
| 250 | 55.0 | 54.5 | 54.8 |
| 315 | 53.1 | 51.9 | 52.5 |
| 400 | 53.7 | 53.9 | 53.8 |
| 500 | 54.4 | 52.6 | 53.6 |
| 630 | 53.4 | 52.9 | 53.1 |
| 800 | 49.3 | 52.2 | 51.0 |
| 1000 | 48.4 | 48.6 | 48.5 |
| 1250 | 50.3 | 50.2 | 50.2 |
| 1600 | 47.1 | 48.2 | 47.7 |
| 2000 | 42.4 | 42.9 | 42.7 |
| 2500 | 44.1 | 43.0 | 43.6 |
| 3150 | 44.1 | 43.1 | 43.6 |
| 4000 | 44.8 | 42.1 | 43.6 |
| 5000 | 43.0 | 40.8 | 42.0 |
| 6300 | 43.8 | 43.5 | 43.7 |
| 8000 | 44.1 | 46.2 | 45.2 |
| 10 000 | 41.8 | 44.9 | 43.6 |
| 12 500 | 37.4 | 40.0 | 38.9 |
| 16 000 | 31.0 | 34.3 | 32.9 |
| 20 000 | 25.6 | 28.0 | 27.0 |
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