CMD Group is a ConstructConnect® company. Learn more

resource center

SmartBuilding Index

Featured Product Overview
SmartBIM Objects available for download BIM Objects
ManuSpec 3-part specs available for download MANU-SPEC 3-part Specs
SpecData datasheets available for download SPEC-DATA Datasheets
Technical Datasheets
03 00 00 - Concrete
04 00 00 - Masonry
05 00 00 - Metals
08 00 00 - Openings
09 00 00 - Finishes
10 00 00 - Specialties
11 00 00 - Equipment
12 00 00 - Furnishings
21 00 00 - Fire Suppression
22 00 00 - Plumbing
23 00 00 - HVAC
26 00 00 - Electrical
27 00 00 - Communications
31 00 00 - Earthwork
33 00 00 - Utilities
34 00 00 - Transportation

Acoustic Finishes Information

Sound waves are reflected when they hit a hard surface. Acoustic insulation material works by preventing reflected sound waves from entering or leaving a room, or from traveling from one place to another, such as between apartments in a building.

Sound Transmission Class (STC) ratings indicate how effective a certain sound insulation material is at blocking sound. The higher the STC number, the better the material blocks sound transmission.

For instance, acoustic insulation material with a STC rating of 25 would allow normal speech to be understood through a wall while material with a STC rating of 60 would render most sounds inaudible.

Acoustic insulation material should not be confused with sound absorption material. They are treated separately in sound control design.