Understanding Sound Ratings

When it comes to work, educational and recreational building environments, unwanted sounds can be a tremendous annoyance and interfere with productivity.

Fortunately, there are highly effective ways of decreasing sound transmission on the marketplace. Merrimack Building Supply now stocks acoustical ceiling tiles and grids made by Rockfon/Chicago Metallic, which has been a leading manufacturer of ceiling tiles in Europe for more than 50 years.

To better understand soundproofing materials and construction techniques that help reduce the transmission of sound, it helps to know what sound ratings mean within the industry.

STC – Sound Transmission Class
This is a way of measuring soundproofing effectiveness. The STC number reflects the overall ability of a material to reduce the transmission of sound. A rating of 60+ means there is excellent soundproofing in place.

NRC – Noise Reduction Coefficient
This tells how much sound acoustic products can absorb, and is measured on a scale that ranges from 0 to 1. The higher the NRC, the better the product is at soaking up sound. Learn more about NRC, here.

CAC – Ceiling Attenuation Class
The effectiveness of acoustic ceiling panels is rated through a system called CAC, which measures how well acoustic panels block sound transmission from one room to another.

ROCKFON PRODUCT RATINGS
Below is a short list of ROCKFON Stone Wool suspended ceilings, and their various ratings:

ROCKFON SONAR
NRC – 0.70 – 0.95
CAC – 22 -25
AC – 190

ROCKFON ALASKA
NRC – 0.70 – 0.90
CAC – 22
AC – 180

ROCKFON KORAL
NRC – 0.85
CAC – 22
AC – 170

ROCKFON MEDICAL
NRC – 0.90
CAC – 22
AC – 170

Merrimack Building Supply carries Rockfon’s highly rated stone wool ceiling tiles, which come in all shapes and sizes and can be customized for every ceiling. They’re a clean and effective way to soundproof a room.

All Rockfon products are lightweight and designed to absorb sound waves while strengthening speech clarity within a building. An added bonus is that they suppress fire damage and won’t cause a fire to spread.

Contact us today, and we will help you find the perfect soundproofing solution for your project.

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