

THE WORLD'S STANDARD |
|
NRR | NOISE ATTENUATION DATA - MODEL 10A | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 3150 | 4000 | 6300 | 8000 | |
| Attenuation (dB) | 10.9 | 20.9 | 28.8 | 32.8 | 35.9 | 37.4 | 38.3 | 37.5 | 37.1 | |
| Standard Deviation | 1.4 | 2.6 | 3.6 | 2.6 | 1.4 | 2.3 | 1.6 | 2.1 | 2.7 | |
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P.O. Box 564
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