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Versatile "Tri-Fit" Style

Price: $33.00
Item Number: 310
Manufacturer: David Clark Company
Manufacturer Part No: 310

  • Excellent Attenuation
  • High Quality Chrome Plated Hardware
  • Low Profile Ear Cups - Color: Red
  • Wide Foam Filled Ear Seals for Maximum Comfort
  • Adjustable Headband for Optimum Fit

    NRR
    24 dB

    		 NOISE ATTENUATION DATA - MODEL 310 OVER-THE-HEAD
    Frequency (Hz) 125 250 500 1000 2000 3150 4000 6300 8000
    Attenuation (dB) 13.8 20.0 25.9 34.0 38.9 41.1 40.6 38.1 35.0
    Standard Deviation 2.7 1.7 2.1 1.3 1.6 1.9 1.0 1.5 1.2


    NRR
    20 dB

    		 NOISE ATTENUATION DATA - MODEL 310 BEHIND-THE-HEAD
    Frequency (Hz) 125 250 500 1000 2000 3150 4000 6300 8000
    Attenuation (dB) 8.0 14.7 24.0 30.9 36.3 39.5 39.8 38.7 35.5
    Standard Deviation 2.1 2.3 2.8 1.7 1.6 2.0 1.7 1.7 1.4

    NRR
    20 dB

    		 NOISE ATTENUATION DATA - MODEL 310 UNDER-THE-CHIN
    Frequency (Hz) 125 250 500 1000 2000 3150 4000 6300 8000
    Attenuation (dB) 8.6 15.5 23.9 32.4 36.9 38.7 38.9 37.8 34.8
    Standard Deviation 2.3 2.2 2.1 1.6 1.9 1.8 1.5 2.3 1.5
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