Concrete Floor Sound Attenuation

M 2300 kg m 3 0 2 m 460 kg m 2.

Concrete floor sound attenuation. The attenuation dl at 250 hz can be calculated as. Carpet with an nrc rating of 40 50 is the most efficient absorptive material. The mass m of a concrete floor with density 2300 kg m 3 and thickness 0 2 m can be calculated as. Protecting a concrete slab a concrete slab is generally an asset for airborne sound isolation.

Sound transmission class stc provides an estimate of the acoustic performance of a wall in certain common airborne sound insulation applications the stc of a wall is determined by comparing sound transmission loss stl values at various frequencies to a standard contour stl is the decrease or attenuation in sound energy in db. Simply put walking down a painted dense high psf weight concrete hallway floor ceiling walls in capped boots will be very noisy but the person in the next room may not hear you very well if there are no. The more the concrete weighs or the denser the concrete the more sound insulation the greater sound transmission loss rating. The large mass weight provides for a great deal of sound isolation from vibrations entering or leaving the room.

The top layer of flooring is only the tip of the iceberg for flooring sound transmission. Example a concrete floor and sound attenuation. From the chart above the mean sound attenuation for the floor can be estimated to. With the national building code nbc expected to change in the near future builders are taking a proactive approach in increasing their sound transmission class stc and impact insulation class iic ratings in multi family hotels and retirement residences.

Dl 52 db. Sound attenuating floor systems.