Pour le spectre ci-dessous, calculez en dB le niveau global du bruit. Précision...
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Pour le spectre ci-dessous, calculez en dB le niveau global du bruit.
Précision:0,1 dB
| fréquence Hz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
| Niveau sonore dB | 66 | 75 | 58 | 62 | 43 | 78 |
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