Handbook for Sound Engineers

Acoustical Treatment for Indoor Areas 123

References

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7. Standard Practices for Mounting Test Specimens during Sound Absorption Tests. ASTM E795-05.


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Table 5-4. Typical ASTM E84 Test Results and Corresponding IBC Classifications for Common Acoustical
Treatments

Acoustical Treatment Flame

Spread

Index

Smoke

Developed

Index

IBC

Class

Comments

Glass Fiber panels 15 0 A Unfaced material

Mineral wool panels 5 10 A Unfaced material

Wood fiber panels 0 0 A Unfaced, treated material

Cotton fiber panels 10 20 A Unfaced, treated material

Acoustical foam panels Polyurethane 35 350 B Unfaced, treated material NFPA 286 test may also be required

Acoustical foam panels Melamine 5 50 A Unfaced material NFPA 286 test may also be required

Acoustical plaster 0 0 A Unfaced material

Acoustical Diffusers Polystyrene 15 145 A Treated material NFPA 286 test may also be required

Acoustical Diffusers Wood 25 450 A Treated material