Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. The estimated ratings are based on laboratory test results from various compendiums of STC ratings.

2016年11月7日 · STC Wall Rating Chart. What is a Good STC Rating? Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. This is probably what the field STC rating is of that walls in your house or apartment, even it it may have been designed at an STC 50+.

2023年3月30日 · For example, a standard interior wall, meaning two sheets of ½ inch drywall separated by wood studs and no insulation, provides an STC rating of 33, which provides almost no soundproofing. If you add standard fiberglass insulation to the wall, your STC jumps to …

The STC Calculator is a tool designed to provide expected STC ratings of your UL assembly based on stud size and spacing, wall types, and drywall layers.

2024年6月15日 · The STC rating chart provides a visual representation of the sound transmission class ratings for different materials, illustrating the amount of sound transmission being reduced and the frequencies of sound being affected.

Materials with higher STC ratings, such as double stud walls or concrete block walls, are beneficial in areas that require maximum speech privacy, such as conference rooms or medical facilities. Download our comprehensive chart, featuring STC ratings for commonly used materials >>

To determine the STC rating of a wall in a lab, they can test out frequencies from 125 Hz to 4000 Hz. This gives some varied answers for sure, which is what is used as part of an average to give an official STC rating.

2024年2月19日 · Explore the STC rating chart for walls, glass, windows, doors, and materials. Learn why STC ratings matter for soundproofing. Learn more.

Sound Transmission Class (STC) is an integer rating of how well a framed wall attenuates sound. Doubling the mass of a wall assembly does not double the STC rating. Adding an additional layer of gypsum wallboard to each side (from two sheets to four sheets) increases the STC by …

2025年1月10日 · The STC wall rating chart measures between 45 – 80. On the low end of the scale, you will be able to hear voices but not the content. At around 55 , loud speech is audible, and at the top end , only very loud music is audible.