Does foam work as soundproofing material? In short, no.
Let’s look at the details so you can avoid wasting your money on expensive polyurethane or polyethylene foam.

Is Foam Good for Soundproofing?

Soundproofing materials come in all shapes, sizes, and textures. There are many different types to choose from, and foam shouldn’t be on your list. Foam is not suitable for soundproofing homes, offices, and cars: ‘it is basically air with a bit of glue and coloring. Because it’s just air, it doesn’t actually absorb sound. Instead, it absorbs vibrations while keeping the air around it moving freely. The trapped air acts like a spring in this case. Foam is best suited for situations where you want to isolate vibrations and not necessarily absorb sound.

Is Acoustic Foam Good for Soundproofing?

Acoustic foam, while popular, is not great for soundproofing for two main reasons: It doesn’t break up air leaks, and it’s low density. For soundproofing to be effective, an object needs to resist vibrations heavily/have a high mass per unit area. If the mass of the object isn’t high enough, sound can easily travel right through it.

Acoustic foam simply doesn’t offer great soundproofing because there isn’t much density in foam objects: It’s light and can transfer vibrations easily; this shouldn’t come as a surprise because, as mentioned above, foam is just air held together by some polymer!

Although the density of the foam is higher than air, there isn’t much weight in that air!

What Is A Good Soundproofing Material

Glass is perfect for soundproofing. We recommend glass because it is solid and dense, which helps block sound. It also has a higher STR rating than foam, which means it reduces more noise per inch of thickness.

How To Analyze Soundproofing Material

The soundproofing performance of a material is measured in decibels per unit thickness (dB/US), a logarithmic measure of sound reduction. The higher the dB/US rating, the better the soundproofing effect or quality. As an example, 2 inches (5 cm) of glass rated at 30 dB/US will reduce the sound pressure level by about 50%. The most important thing to remember when it comes to soundproofing is that no material can be 100% effective.

There is always going to be some level of noise leakage through any material. However, because of its dense makeup, glass has some major advantages over foam.

Quality Sound Barriers: Foam Vs. Glass Soundproofing

Glass is a better sound barrier than foam because it absorbs sound waves better than porous materials like wood or drywall. And the thicker the glass, the more effective it will be in blocking noise from outside. It does not transmit sound well unless it’s broken or cracked.

Foam may absorb sound waves, but it also allows them to pass through. This means that if you’re using foam insulation in a window frame, for example, there’s a chance that some sounds made by people or traffic outside will be audible inside your home.

If you want to learn more about glass as a soundproofing material, check out our blog post on the subject: Why glass is good for soundproofing.

Get Quality Glass Soundproofing In Texas

Made in Texas and manufactured for various applications, our glass provides excellent noise reduction for both interior and exterior environments. We make our panels from glass rather than acrylic to create a thicker, more effective sound barrier. And when it comes to window soundproofing, the increased window thickness also helps you save on energy and reduce drafts. To learn more, call us at 281-336-8685 or get a free quote!