RADIANS
Defender 23 Features:
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Adjustable headband slides to fit most sizes
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Foam filled, padded ear cups fit securely and comfortably over the ear
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Noise reduction rating of 23 dB
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Light weight and dielectric
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Durable construction
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Sound Attenuation Data Tested to ANSI S3.19-1974 STANDARD
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| Frequency in (Hz) |
125 |
250 |
500 |
1000 |
2000 |
3150 |
4000 |
6300 |
8000 |
| Mean Attenuation dB |
15.2 |
17.6 |
28.1 |
33.5 |
36.1 |
39.3 |
41.2 |
39.9 |
40.3 |
| Standard Deviation dB |
2.6 |
2.5 |
2.8 |
3.3 |
3.6 |
3.6 |
3.1 |
2.9 |
3.1 |
| NRR = 23 dB |
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