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  1. Comfort
  2. Sound reducing surfaces

Sound reducing surfaces

Features/Comfort/Feature 80

Sound reducing surfaces

Intent: 

To reduce sound reverberation and maintain comfortable sound levels though absorptive ceiling and wall surfaces.

80: Sound reducing surfaces
    Post Date: 16 Mar, 2018
    Status: Approved

    Alpha W (αw) has been accepted as an equivalent to the Noise Reduction Coefficient (NRC) requirements of Feature 80 – Sound Reducing Surfaces, Parts 1-3.

    Note that Alpha W is, like NRC, a single number metric for sound absorption that ranges from 0.00 to 1.00 and represents the average absorption coefficient of a given material across 125 Hz to 4 kHz, while NRC is a metric based on absorptive coefficients of a given material across 250 Hz to 2 kHz.