Sound reducing surfaces

Features/Comfort/Feature 80

72 Accessible design
73 Ergonomics: visual and physical
74 Exterior noise intrusion
75 Internally generated noise
76 Thermal comfort
77 Olfactory comfort
78 Reverberation time
79 Sound masking
80 Sound reducing surfaces
81 Sound barriers
82 Individual thermal control
83 Radiant thermal comfort
P4 Impact reducing flooring

Sound reducing surfaces

Intent:

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

FAQ 2
Resources 3
Overview
AAP 0
Equivalencies(active tab) 1
Amendments 6

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.