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2. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the ...

3. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   Spray foam is not porous enough to absorb sound and is also not dense enough to stop sound. [citation needed] An effective method to reduce impact noise is the "resilient isolation channel". [13] The channels decouple the drywall from the joists, reducing the transfer of vibration.

4. Drywall - Wikipedia

   en.wikipedia.org/wiki/Drywall

   Sound transmission may be slightly reduced using regular 5 ⁄ 8-inch (16 mm) panels (with or without light-gauge resilient metal channels and/or insulation), but it is more effective to use two layers of drywall, sometimes in combination with other factors, or specially designed, sound-resistant drywall. [26]

5. What's the Actual Difference Between Sheetrock and Drywall? - AOL

   www.aol.com/whats-actual-difference-between...

   5/8-inch drywall: The thickest type of drywall, 5/8-inch drywall is often fire resistant and is the best choice for soundproofing. It's also great for ceiling applications because it can help ...

6. Noise barrier - Wikipedia

   en.wikipedia.org/wiki/Noise_barrier

   A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution. Noise barriers are the most effective method of mitigating roadway, railway, and industrial noise sources – other than cessation of ...

7. Acoustic plaster - Wikipedia

   en.wikipedia.org/wiki/Acoustic_plaster

   Acoustic plaster. Acoustic plaster is plaster which contains fibres or aggregate so that it absorbs sound. Early plasters contained asbestos, but newer ones consist of a base layer of absorptive substrate panels, which are typically mineral wool, or a non-combustible inorganic blow-glass granulate. A first finishing layer is then applied on top ...