Model 27 Combines Comfort Durability and Quality
Assembled by means of bolts and self-locking cadmium plated nuts Premium Quality chrome plated steel headband, in accordance with demanding Government specifications Closed cell, nonabsorbent bump cushion with protective outer support Foam-filled ear seals for perfect fit, best noise attenuation, and unequaled comfort Ear cups of top quality, high impact ABS, made extra rigid by patented ribbed construction Adjustable Headband for Optimum Fit Certified NRR of 22dB NRR
22 dB | NOISE ATTENUATION DATA - MODEL 27 |
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 3000 | 4000 | 6000 | 8000 |
| Attenuation (dB) | 22.9 | 26.4 | 26.1 | 31.0 | 31.5 | 33.6 | 35.5 | 35.8 | 35.8 |
| Standard Deviation | 3.8 | 3.5 | 3.7 | 3.1 | 3.3 | 4.2 | 4.7 | 4.9 | 4.3 |
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