Mass Loaded Vinyl (MLV) Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Dense, flexible PVC-based sheet (typically 2-5 kg/m²) used as a sound barrier within wall and ceiling assemblies. Blocks sound transmission through mass. Does not absorb sound — reflects it. Used in combination with absorptive materials for complete acoustic treatment.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.05 | 0.04 | 0.03 | 0.03 | 0.03 | 0.03 |
RT60 Impact
MLV is a sound barrier, not an absorber. It blocks sound transmission but does not reduce RT60 within the room
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of Mass Loaded Vinyl (MLV)?
Mass Loaded Vinyl (MLV) has an NRC (Noise Reduction Coefficient) of 0.05, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Mass Loaded Vinyl (MLV) typically used?
Mass Loaded Vinyl (MLV) is typically used as a wall (within assembly) and ceiling (within assembly) treatment. Dense, flexible PVC-based sheet (typically 2-5 kg/m²) used as a sound barrier within wall and ceiling assemblies.
How much does Mass Loaded Vinyl (MLV) reduce RT60?
MLV is a sound barrier, not an absorber. It blocks sound transmission but does not reduce RT60 within the room
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