Soundproofing With Carpet: Home's Acoustics

When it comes to interior design and acoustics, soundproofing with carpet is a well-known strategy. With their dense fibers and soft surface, carpets can absorb sound waves, reducing echo and noise in a room. But how exactly does this work? Let's find out.

How do carpets absorb sound?

Carpets absorb sound by trapping sound waves instead of letting them bounce off hard surfaces, as would a wood or tiled floor. The carpet's air and fibers capture sound waves and prevent their reflection, reducing sound levels and attenuating echoes.

Wool carpets are particularly effective because they have a multitude of fibers of varying lengths, diameters, loops and spirals, enabling sound absorption over a wide range of frequencies.

On average, a carpet can reduce ambient noise by 35%, while a wool carpet can achieve a noise reduction of 46% ( Acoustic Benefits of Carpet - Carpet Institute. (n. d.). https://www.carpetinstitute.com.au/residential/carpet-noise-pollution-reduction/). With the addition of an underlay, noise reduction can reach 50% to 70%.

Debunking myths: the truth about carpets and soundproofing

Myth 1 - All carpets offer the same level of soundproofing

It's a common misconception that all carpets offer soundproofing. But not all carpets are equally effective. A carpet's ability to soundproof depends on its thickness, density and the material used to make it. So, to the question: "Is carpet effective for soundproofing?", the answer would be: it depends.

Myth 2 - Carpets completely block out outside noise

One of the biggest misconceptions about carpets and soundproofing is that they can completely block outside noise from entering a room.

In fact, they mainly absorb sound from inside the room, rather than blocking sound transmission from outside.

To achieve complete soundproofing, it's essential to combine flooring with other sound-blocking measures, such as acoustic seals, double-glazed windows or insulating materials.

The noise spectrum: understanding which sounds carpets can attenuate

Carpets are particularly good at absorbing high-frequency sounds, such as footsteps or chatter. On the other hand, they are less effective at blocking low-frequency noises, such as the rumble of a truck or the bass of a stereo system.

This is because the fineness and structure of carpets reflect these lower frequencies instead of absorbing them, generating a "resonance" effect. As a result, carpets are not effective in countering low-frequency noise.

The hidden hero: the importance of soundproof carpet underlay

While carpets play a significant role in soundproofing, a soundproofing underlay can significantly improve the floor's absorption capabilities, making your space even quieter.

Choosing the right underlay

It's essential to select the right underlay for your soundproofing needs. Here are a few factors to consider when making your decision:

Material and density

Underlay comes in a variety of materials, such as foam, rubber, felt and cork. Each material offers different soundproofing properties, so it's crucial to choose the one that suits your specific needs. In addition, the density of the underlay affects its soundproofing capabilities. Higher density generally translates into better sound absorption.

Thickness

The thickness of the underlay also plays a role in its soundproofing performance. A thicker underlay generally offers better impact noise reduction. However, it's important to strike a balance, as excessively thick underlay can affect carpet stability or cause unevenness.

Note: Thickness is different from density. A material can be thick but not dense (like a sponge), or dense but not thick (like a steel plate). In the context of carpet pad, a combination of appropriate thickness and density will give the best soundproofing results.

Carpet compatibility

Make sure the underlay you choose is compatible with the type of carpet you plan to install. Different carpet materials and pile heights may have specific underlay requirements. Consulting a flooring professional or manufacturer can help you make an informed choice.

Choosing the best mat for sound absorption

When it comes to choosing the best mat for sound absorption, you need to consider factors such as thickness, density and material. A thick, dense carpet made from wool like High line is generally a very good choice. On the other hand, if you want synthetic fibers, opt for polypropylene mats like Florence, polyester mats or a mixture of the two like Rhapsody. Their densely packed fibers effectively trap and absorb sound waves.

Similarly, for the underlay, opt for materials such as rubber or foam, as they have excellent sound-absorbing properties.

The combination of thick, dense carpet and high-quality underlay creates a formidable soundproofing solution.

Beyond the floor: the potential of carpets for soundproofing walls

While carpets are commonly used on floors, they can also be used on walls for additional soundproofing. This can be particularly useful for soundproofing in music studios or shared spaces.

Cost-benefit analysis: assessing the cost of soundproofing with carpets

Soundproofing with carpet can be a cost-effective solution, especially when compared with other soundproofing methods. However, it's important to consider both the initial costs and the long-term benefits.

Initial costs

The cost of soundproofing with carpet mainly includes the price of the carpet itself and the carpet pad. The price range generally varies according to the type and color chosen, from around $1.40 to $8.79 per square foot.

Similarly, the cost of carpet pad can vary from $0.66 to $6.60 per square foot, depending on the type of carpet pad selected. It's important to consider the size of the area to be covered when calculating the total initial cost.

Long-term benefits

Carpets offer long-term benefits such as thermal insulation, improved indoor air quality and enhanced comfort. They insulate against cold floors, reduce energy consumption and trap dust and allergens, improving air quality.

What's more, the carpets offer a soft feel underfoot and, with a wide variety of types, colors and patterns available, offer customization options for any desired ambience and decor.

Conclusion

Finally, the decision to install carpets for soundproofing must take into account acoustic needs, aesthetics and budget. With careful planning, soundproofing with carpets can transform your home's acoustic ambience, making it a more peaceful and pleasant space.

If you have any further questions about carpets and soundproofing, find a store near you to discuss them with one of our experts.