Sound Ratings Of Concrete Block Walls

Adding mass the weight or thickness of a partition is the major factor in its ability to block sound.

Sound ratings of concrete block walls.

One has an stc 47 4 solid concrete the other an stc 48 steel stud wall. When the mass of a barrier is doubled the. Note that in the low frequency range important for music theaters traffic aircraft and most other real world noise sources the lower stc wall is literally 30 decibels better yet lower stc. Sound reducing paint is a suitable diy option for controlling the noise level in a room made from concrete block walls.

Mass is commonly added to existing walls by adding additional layers of gypsum. The sound transmission class stc rating provides an indication of how effectively a given wall prevents sound transmission across a range of frequencies. Concrete masonry walls are often used for their ability to isolate and dissipate noise. This rating can be 1 2 3 1 1.

This is the least difficult option because sound reducing paint is. Leaf thickness 1 4 compared with the results of other labora 1 2 3 1 2. National research council of canada 1998. Concrete masonry offers excellent noise control in two ways.

Stc ratings for concrete masonry walls are determined using standard method for determining the sound transmission class rating for masonry walls tms 0302 ref. Ncma tek 13 1c revised 2012. Stc ratings for masonry walls. National concrete masonry association 2007.

Cellular and hollow blocks are not permitted for use in robust standard detail. Leaf thickness 1 4 tory tests which use the same rating pro 1 2 3 1 3. Noise control with concrete masonry tek 13 2a. Controlling sound transmission through concrete block walls construction technology update no.

8 concrete block wall painted with 1 2 drywall on independent steel stud walls each side insulation in cavities stc prediction edit there are several commercially available software which predict the stc ratings of partitions using a combination of theoretical models and empirically derived lab data. For the fifth and final section heading called the sound transmission class or level choose among the following. We see two walls. For example a thick concrete wall will block more sound than a thin gypsum 2x4 wall.