SOUND DESIGN
NRC? Let’s talk about it. Noise Reduction Coefficient ( NRC ) is a measurement of how much sound a surface absorbs. Acoustic solutions performance is measured using this rating.
REVERBERATION
Reverberation is to sound what reflection is to light. It is the persistence of sound after it’s produced. When these sounds stack up, communication gets tricky—people tend to talk even louder, just to be heard, resulting in more reverb…and the cycle continues. “Reverberation time” is the measure of time it takes for sound to drop 60 decibels from its original level. An ideal reverb time for a classroom or office is 0.6 seconds.
0
1
NRC 0.02 Brick or Concrete
NRC 0.05 Standard Drywall
NRC 0.35 Deep Pile Carpet
NRC 0.4 - 0.9
ZERO % SOUND ABSORBTION
100% SOUND ABSORBTION
THE RIGHT SOLUTION FOR YOUR SPACE
It’s possible to over-engineer your acoustic solutions to where a space is “too quiet”. The right solution may combine materials of varying NRC ratings to create the perfect soundscape. From floor-to-ceiling rigid panels, which offer the most sound dampening, to shapes mixed with standard wall coverings or rolled acoustical textures, these options can be combined to create just the right lively hum, without creating too much buzz or too much hush.
SOUND ABSORPTION
REVERBERATION
SOUND ABSORPTION ( NRC )
PERFORMANCE IS BASED UPON CONFIGURATION
Sound absorption is the quality found in different materials that reduce reverberation times by absorbing sound energy and reducing sound levels. By eliminating unwanted sound, these materials can improve sound quality in a room. Different types of materials either reflect or absorb sound to different degrees. For instance, smooth concrete may absorb just 2% of sound, while reflecting the remaining 98%. In contrast, an acoustic panel with airspace behind it might absorb 75% of the sound that hits it.
1.75”
5.98”
Clip System NRC 0.45
Adhesive NRC 0.45
Standoff NRC 0.7
6” Framing NRC 0.8
Momentum Acoustic Surfaces | 57
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