Open Access
Table B.5.
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.
| Sound power level (dB re 10−12 W) | |||
|---|---|---|---|
| Octave band (Hz) | Average of six male talkers | Average of six female talkers | Average of six male and six talkers |
| 63 | 55.2 | – | – |
| 125 | 67.1 | 62.1 | 65.3 |
| 250 | 66.9 | 67.5 | 67.2 |
| 500 | 68.5 | 68.2 | 68.3 |
| 1k | 62.4 | 64.1 | 63.3 |
| 2k | 57.2 | 57.1 | 57.1 |
| 4k | 54.8 | 53.4 | 54.1 |
| 8k | 54.3 | 56.0 | 55.2 |
| 16k | 44.5 | 47.1 | 46.0 |
| A-weighted (63 Hz–16 kHz) | 68.6 | – | – |
| A-weighted (125 Hz–8 kHz) | 68.6 | 68.9 | 68.7 |
| A-weighted (125 Hz–16 kHz) | 68.6 | 68.9 | 68.7 |
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