Rubber Resilient Underlay Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Recycled rubber crumb or EPDM sheet underlay for floating floors. Primary function is impact noise isolation (IIC improvement of 15-25 dB) rather than airborne absorption. Essential component of sound-rated floor assemblies.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.04 | 0.08 | 0.12 | 0.18 | 0.22 | 0.20 |
RT60 Impact
Rubber underlay primarily improves impact isolation, not RT60. Minimal effect on reverberation time
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of Rubber Resilient Underlay?
Rubber Resilient Underlay has an NRC (Noise Reduction Coefficient) of 0.15, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Rubber Resilient Underlay typically used?
Rubber Resilient Underlay is typically used as a floor (underlay) treatment. Recycled rubber crumb or EPDM sheet underlay for floating floors.
How much does Rubber Resilient Underlay reduce RT60?
Rubber underlay primarily improves impact isolation, not RT60. Minimal effect on reverberation time
Use Rubber Resilient Underlay in Your Room Simulation
Select rubber resilient underlay and 5,600+ other materials in AcousPlan's free RT60 calculator. Instant compliance check included.
Open Free Calculator