What is acoustic value?

The noise reduction coefficient (commonly abbreviated NRC) is a single number value ranging from 0.0 to 1.0 that describes the average sound absorption performance of a material. An NRC of 0.0 indicates the object does not attenuate mid-frequency sounds, but rather reflects sound energy.

What is a good STC?

STC rating of 38-42 is considered good soundproofing for residential. STC rating of 50-65 is professional, commercial soundproofing for recording studios, etc. These terms and definitions are related to Sound Transmission Class and will help provide the full picture of how sound is measured. dBa – A-weighted decibels.

What is a good IIC rating?

The International Building Code suggests a rating of 50 or more for IIC and STC, but allows 45 or more for FIIC or FIIC field tests.

Is a higher or lower STC rating better?

Higher STC ratings generally are better. This means that extremely low frequencies don’t register on the STC rating scale, thus when a sound on one side of a wall is below 125Hz, the ability of the wall to block sound cannot be calculated. STC is not a direct measure of how many decibels of sound a wall can stop.

How is soundproofing rated?

The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels. STC ratings are a logarithmic scale similar to the earthquake Richter Scale, which means each number is significantly higher than the one before.

What is dB rating?

Sound is measured in units called decibels (dB). The higher the decibel level, the louder the noise. On the decibel scale, the level increase of 10 means that a sound is actually 10 times more intense, or powerful.

What STC rating is soundproof?

In many cases less noise will be coming through the Soundproof Windows than the walls. Most walls have an STC of 43-48: Soundproof Windows usually have an STC rating of 48-54.

How do I get a 50 STC rating?

Add Soundproofing Membranes: If you need to achieve an STC of 50 or higher, consider using a soundproofing membrane. These products offer decoupling by separating the drywall from studs, and also significant mass increases.

Is vinyl plank flooring soundproof?

Benefits of Soundproofing Vinyl Flooring The obvious benefit of soundproofing a vinyl floor with a quality underlayment is that you can enjoy many of the impact soundproofing benefits of a carpeted floor without having to actually lay down carpet, and you will be able to effectively block airborne noise as well.

What is the STC rating of 2 layers of 5/8 drywall?

between 30-34
With two sheets total, of 5/8” drywall utilizing standard insulation we often see STC ratings ranging between 30-34. With two total sheets of ½” drywall (common for residential interior walls) we usually see an STC rating of around 33.

What does STC 35 mean?

When we say STC-35, it means the enclosure, wall partition or door reduce noise by 35 decibels. A sound reduction of 35 decibels is very high. Most similar soundproof enclosures on the market reduce noise by only 15 to 25 decibels.