Can you buy soundproof drywall?

Soundproof drywall is a specialized type of drywall manufactured with additional materials that enhance its ability to act as a barrier against sound. In addition to containing gypsum, soundproof drywall also contains viscoelastic and ceramics, which work together to reduce the transmission of sound from both internal and external sources.

What is the stc rating of drywall?

The ability for acoustical drywall to reduce sound transmission is rated by its Sound Transmission Class, or STC. The higher the STC rating the better at blocking noise. Acoustical drywall typically has an STC rating around 47-52. At a value of 50 STC, only very loud sounds such musical instruments can still be faintly heard.

What is the best drywall for soundproofing?

The best drywall for soundproofing can be identified by its ability to reduce sound transmissions, rated by its sound transmission class (STC). A standard STC rating for walls is 43-48. Acoustical drywall often have an STC rating of 47-52. At an STC of 50, only very loud sounds such musical instruments can still be faintly heard.

What are the reasons to soundproof a room?

Soundproofing a room offers the advantage of reducing the amount of noise that exits or enters from the outside. For a musical room, soundproofing can enhance recording quality by absorbing unwanted ambient noise. For smaller spaces such as in an apartment, soundproofing can keep out unwanted background noise and maintain a calmer atmosphere. Soundproofing can also be beneficial for entertainment rooms by reducing loud noise that could otherwise be heard by neighbors.

In-Depth Product Guide

Acoustical Drywall

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Acoustical drywall typically consists of a layer of viscoelastic polymer sandwiched between two thin layers of regular drywall (gypsum board). It is used for interior wall and ceiling surfaces to reduce the transmission of sound between living spaces in a building.

The ability for acoustical drywall to reduce sound transmission is rated by its STC (sound transmission class). The higher the STC the better, and acoustical drywall has an STC of about 47-52. At a value of 50 STC, only very loud sounds such musical instruments can still be faintly heard. Note that the STC rating does not apply to low frequency sounds like bass sounds from a home theater, truck or airplane traffic, and musical instruments like a bass or drums. To eliminate these sounds it may be necessary to add an additional layer of drywall. Look for low-VOC or no-VOC products. Because of the extra layer of drywall, acoustical drywall cannot be cut with a knife like regular drywall. Instead, a saw must be used, making the installation costs much higher.

Acoustical drywall can help achieve higher density living without sacrificing comfort. For example, it can help reduce sound between two apartments in a house with multiple units; or it can help reduce noise between an entertainment room and a bedroom in a house with a small footprint.

STC (sound transmission class) was invented in 1961 to classify the sound transmission through various door, window and wall assemblies.