Soundproofing Plus: Choosing the Right Soundproof Insulation

Choosing the Right Soundproof Insulation

In the world of soundproofing, soundproof insulation means different things in different situations. Sure, it’s always installed to keep sound from entering or escaping a room, but there’s much more to the story. Here are a few points to keep in mind when soundproofing a room.


Step one: When deciding the type and thickness of insulation, carefully consider your sound reduction goal. Do you need total soundproofing, or will a reduction in sound be sufficient?

A typical drywall installation over studs, backed with insulation, has a sound transmission coefficient (STC) of around 43. In other words, you’re likely to hear conversation from one room to the next. One layer of Audimute 3.2 mm Peacemaker soundproof insulation increases the STC to around 55. Increasing the STC by 10 reduces the sound transmission by half, so you’ve more than doubled your soundproofing. Using additional layers of soundproof insulation and drywall will further increase the STC.

Step two: Consider the frequency of the sound. STC is an average, and the basic STC math changes when you consider frequency. An STC that’s effective against the frequencies of conversation, street noise, or other mid- or high-frequency sounds may not be as effective against long, low-frequency waves—and vice versa. Bass, machinery noise and vibration, and structural noise may require different or additional materials to effectively soundproof a room.

Both 2.0 mm and 3.2 mm Peacemaker are designed to block mid- and high frequencies, while an effective low-frequency or anti-vibration approach includes more mass and soundproofing insulation with strong resilient properties. Audimute 6.4 mm Peacemaker is thicker and more elastic. It decouples walls and floors from the surrounding building, isolating low frequencies and vibration. It is not, however, designed to act as high- or mid-frequency soundproof insulation, so if you’re looking for broad-spectrum isolation, you may need to take a combination approach.

Long story short: There’s a lot to consider when soundproofing, and that’s why Audimute is here. Give us a call; we’re always happy to discuss your soundproofing goals and give you the straight answer about what you need, what you don’t, and how you can get the job done right.

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