What is the audio transmission class?

The

audio -class rating measure the ability of the structure to resist or reduce audio transmission. The assessment of the audio transmission class developed during the sixties by ASTM International, provides one of the most used methods of measuring sound transmission in building materials. These rating can be used to measure sound levels through a wall, ceiling or even a door or window. The higher the audio transmission class or the StC structure evaluation, the less the sound passes through the structure. Lower STC rating generally means that the structure performs poor work when blocking audio transmission.

The official evaluation of the performance performance of the STC is determined by means of testing and benchmarks developed in industry. As an example, the inner walls built with plasterboard and insulation generally range from STC-30 to STC-42. At this level, the loud speech is audible through the wall, but it may be difficult to distinguish specific words or phrases. If plasterboard is used instead of plasterboard, STC rating can increase by 10 or moree points and create a better feeling of privacy in space.

One of the most important things that needs to be understood about the evaluation of the audio transmission class is that they are not cumulative. Gypsum with STC-20 evaluation installed above the STC-10 measurement insulation automatically do not produce a wall with a sound class 30. For this reason, manufacturers often claim that their products can increase the StC rating by a specific scope of points. The materials themselves cannot provide a specific STC assessment in themselves.

Suppliers and designers have three basic options for increasing STC evaluation. SoundProofaling may include the addition of material or weight to the structure. It may also include the addition of a form of separation or air space between adjacent materials or structures. And finally, the use of products that absorb a sound VLNY can also serve as an effective form of noise control.

To increase the evaluation of the audio transfer class, builders can choose a sound -resistant plasterboard or audio plate to replace standard materials. They can also add insulation to absorb sound waves or use special clips and hangers to create air cavities inside a wall or ceiling. Special doors with ambient sound seals can block noise transmission via the hole. Sound resistance foam can also be used to control noise levels in recording studios or domestic theaters where a high STC rating may be required.