Memory Foam for Soundproofing: Benefits, Types, and Installation

Memory foam is known for its exceptional noise reduction qualities, outperforming other foams and sponges. Remarkably, memory foam exhibits linear sound absorption across the frequency spectrum. This unique property makes it highly effective in reducing noise levels compared to other foam materials.

While memory foam can help dampen sounds, it is not an ideal dedicated soundproofing material compared to purpose-built acoustic foam panels or mineral wool. Combining it with other absorptive materials may provide some additional noise reduction.

In this detailed guide, we’ll explore how effective memory foam really is at blocking sound. We’ll overview the acoustic properties that allow memory foam to absorb noise and analyze its performance across different frequency ranges.

We’ll also compare memory foam to other popular soundproofing materials, and provide tips for getting the most noise reduction from memory foam panels or mattress toppers. Let’s dive in to the science behind this unique material and how it stacks up for real-world soundproofing needs.

What is Memory Foam?

Memory foam is a type of polyurethane foam that is known for its ability to conform to the shape of the body and then slowly return to its original shape. This makes it an ideal material for mattresses, pillows, and other products that are designed to provide comfort and support. Memory foam is also an effective soundproofing material, as it can help to absorb and block sound waves.

Memory foam is made from a combination of polyurethane, isocyanates, and other chemicals. The mixture is heated and then poured into a mold, where it expands and takes on the shape of the mold. The foam is then cooled and cut into the desired shape.

Memory foam is a relatively new material, having been first developed in the 1960s. However, it has quickly become one of the most popular materials for mattresses and other comfort products. This is due to its unique combination of comfort, support, and soundproofing properties.

Types of Memory Foam for Soundproofing

Memory foam is a versatile material that can be used for a variety of soundproofing applications. There are several different types of memory foam available, each with its own unique properties. The type of memory foam you choose will depend on the specific needs of your project.

• Open-cell memory foam is a type of memory foam that has a porous structure. This allows air to flow through the foam, which helps to dissipate sound waves. Open-cell memory foam is a good choice for soundproofing applications where you need to absorb sound, such as in a recording studio or home theater.
• Closed-cell memory foam is a type of memory foam that has a dense structure. This prevents air from flowing through the foam, which makes it more effective at blocking sound waves. Closed-cell memory foam is a good choice for soundproofing applications where you need to block sound, such as in a noisy office or apartment.
• Hybrid memory foam is a type of memory foam that combines the properties of open-cell and closed-cell memory foam. This type of memory foam is a good choice for soundproofing applications where you need to both absorb and block sound.

In addition to the different types of memory foam, there are also different densities of memory foam available. The density of memory foam is measured in pounds per cubic foot (PCF). The higher the density of memory foam, the more effective it will be at soundproofing.

When choosing a type of memory foam for soundproofing, it is important to consider the specific needs of your project. If you need to absorb sound, open-cell memory foam is a good choice. If you need to block sound, closed-cell memory foam is a good choice. If you need to both absorb and block sound, hybrid memory foam is a good choice.

Is Memory Foam Good for Soundproofing?

Memory foam is not a good soundproofing material. However, it is an effective material for dampening sound by absorbing sound waves as opposed to reflecting them, which reduces echoes and the distances sound may travel in a given space.

Using the materials you already have can be a huge money and time saver since you might want to simply reuse an existing memory foam mattress or a similar product.

Memory foam, as described by the Sleep Foundation, is a material that softens when in contact with body heat, molds to one’s contours, and distributes weight evenly. While it offers comfort and support for sleep, its effectiveness for soundproofing is limited.

Benefits of Using Memory Foam for Soundproofing

Memory foam is an excellent soundproofing material because it is dense and absorbs sound waves. It is also a good insulator, which helps to reduce noise from outside sources. Memory foam can be used in a variety of applications, including:

• Soundproofing walls and ceilings: Memory foam can be installed on walls and ceilings to reduce noise from outside sources. It is a good choice for homes, offices, and other buildings that are located in noisy areas.
• Soundproofing floors: Memory foam can be installed on floors to reduce noise from footsteps and other sources. It is a good choice for homes, apartments, and other buildings with hardwood or tile floors.
• Soundproofing machinery: Memory foam can be used to soundproof machinery and other noisy equipment. It is a good choice for factories, warehouses, and other industrial settings.

Memory foam is a versatile and effective soundproofing material that can be used in a variety of applications. It is a good choice for homes, offices, and other buildings that are located in noisy areas.

Disadvantages of Using Memory Foam for Soundproofing

While memory foam is an effective soundproofing material, it does have some disadvantages.

• Cost: Memory foam can be more expensive than other soundproofing materials, such as fiberglass or cellulose.
• Durability: Memory foam can break down over time, especially if it is exposed to heat or moisture.
• Fire resistance: Memory foam is not fire resistant, so it can be a hazard in the event of a fire.
• Off-gassing: Memory foam can release harmful chemicals into the air, which can cause health problems for some people.
• Weight: Memory foam is a heavy material, so it can be difficult to install and move.

Overall, memory foam is a good soundproofing material, but it is important to be aware of its disadvantages before making a decision about whether or not to use it.

How Does Memory Foam Work?

Memory foam is a viscoelastic material, which means it has both viscous and elastic properties. When you apply pressure to memory foam, it slowly conforms to your body shape and then slowly returns to its original shape when the pressure is removed. This unique property of memory foam makes it an excellent material for soundproofing because it can help to absorb and dissipate sound waves.

When sound waves hit a surface, they cause the surface to vibrate. These vibrations can then be transmitted through the air or through solid objects, such as walls and floors. Memory foam can help to reduce these vibrations by absorbing the sound waves and dissipating them as heat. This can help to reduce the amount of noise that is transmitted through a room or building.

How Memory Foam Interacts with Sound

Memory foam is able to absorb vibrational energy thanks to its viscoelastic structure. When sound waves enter the foam, the material deforms to absorb the acoustic energy rather than reflecting it. This damping effect can reduce echoes and reverberation to an extent.

However, it lacks the density and mass required to prevent sound transmission. It performs moderately at absorbing mid-range frequencies but struggles with low bass tones. Thinner foam of 1-2 inches allows a fair amount of audible noise to pass through.

It’s sound absorption also diminishes over time as the foam loses its elasticity. Performance degrades as it compresses permanently or becomes stiffer with age.

Performance by Frequency

Not all sounds are created equal. The spectrum of audible frequencies ranges from 20Hz at the very low end to 20,000Hz (20kHz) at the extreme high end. Humans speak between 85Hz to 255Hz, while common environmental sounds like appliances, traffic, and music span the range.

Memory foam excels at absorbing mid to high range frequencies while struggling with very low bass tones. Here’s a breakdown of how it performs across the acoustic spectrum:

20Hz to 125Hz (extremely low bass)

• Poor. Memory foam does not absorb these very low rumbling frequencies well. Sound waves can pass through with little damping.

125Hz to 400Hz (low to mid bass)

• Moderate. Absorption improves but thinner foams still perform poorly. Need 2″+ thickness for adequate absorption.

400Hz to 4000Hz (midrange to high treble)

• Excellent. Memory foam really shines in this range which covers most speech frequencies and household sounds. Even 1″ thicknesses absorb up to 90% of sounds.

4000Hz to 20kHz (very high treble)

• Good. Performance tapers off at the extreme upper end but memory foam still absorbs these high pitches reasonably well.

As you can see, memory foam is very effective for medium and high frequency noise but lacks low frequency sound blocking. A general rule is the thicker and denser the foam, the better across all frequencies. Let’s explore why thickness matters…

Importance of Thickness

Memory foam’s density gives it inherent sound absorbing properties. But like any material, thickness plays a key role in how well it blocks noise. Thin sheets under 1 inch provide minimal soundproofing as noises easily pass through. 2-3 inches is optimal, while 4 inch+ panels greatly improve low frequency absorption.

This is because low bass sounds have long wavelengths that require thicker materials to disrupt. High frequencies have short wavelengths that are readily absorbed even by thin foam. Adding thickness allows longer, deeper wavelengths to be absorbed before they reflect off a hard surface behind the foam.

According to eFoam website, memory foam can help dampen sound to some extent by absorbing sound waves rather than reflecting them, thus reducing echoes and the distance sound may travel within a space.

So if you want memory foam to live up to its maximum sound blocking potential across the frequency spectrum, go thick. Thin mattress toppers may seem convenient and affordable but will only dampen limited frequencies. Prioritize thicker wall panels or custom cut foam for whole-room noise reduction.

Noise Reduction Ratings

You may see NRC (noise reduction coefficient) or SAA (sound absorption average) ratings used to quantify how well a material absorbs noises. These ratings represent the average percentage of sound energy absorbed across frequencies. An NRC of 0.9 means 90% of sound striking the material is absorbed rather than reflected.

Typical NRC ratings of memory foam are:

• 0.3 to 0.7 for 1 inch thickness
• 0.7 to 0.9 for 2 inch
• 0.9 to 1.0+ for 3-4 inches

This demonstrates why thickness is so key for memory foam’s acoustic performance. At just 1 inch, it only absorbs 30-70% of noise. But at 3 inches depth, it achieves 90-100% absorption for most frequencies in its effective range.

How to Install Memory Foam for Soundproofing

Installing memory foam for soundproofing is a relatively simple process that can be completed in a few hours. However, there are a few things you need to keep in mind to ensure that the installation is successful.

1. Prepare the surface. The first step is to prepare the surface where you will be installing the memory foam. This means cleaning the surface and removing any dust or debris. You may also need to level the surface if it is not already level.
2. Cut the memory foam. Once the surface is prepared, you need to cut the memory foam to the desired size. You can use a sharp knife or a saw to cut the foam. Be sure to measure the area where you will be installing the foam before you cut it.
3. Install the memory foam. Once the foam is cut, you can install it on the surface. You can use adhesive spray or double-sided tape to secure the foam in place. Be sure to press the foam firmly into place so that it is secure.
4. Test the soundproofing. Once the memory foam is installed, you can test the soundproofing by listening to music or talking in the room. You should notice a significant reduction in noise levels.

If you are not comfortable installing memory foam yourself, you can hire a professional to do it for you. However, installing memory foam is a relatively simple process that can be completed in a few hours.

Popular Acoustic Foam for Absorbing Sound

There are several fantastic products available for soundproofing, including acoustic foam panels. Here are a few recommendations:

• Mybecca Acoustic Panels Studio Foam Wedges (12-Pack) – One of the best ways to reduce noise in a space is to use acoustic foam. Mybecca Acoustic Panels Studio Foam Wedges are high-quality foam panels that come in various styles. They are made in the USA and are suitable for home offices, home theaters, and recording studios.
• Burdurry Acoustic Panels Studio Foam Wedges (24-Pack) – Burdurry Acoustic Panels Studio Foam Wedges are another excellent option. They offer great sound absorption, are made entirely of eco-friendly foam, and are particularly effective at dampening mid- to low-frequency sounds.

If you want to know if these soundproofng foam are good for soundproofing or not then we have tested the soundproofing efficiency, we have included everything in the linked article. So, just click the link.

Here is another helpful guide where we have walked you through the process of sticking soundproofing foam to doors. I have linked that too, so you can bookmark it and read it later whenever possible.

Cost of Memory Foam for Soundproofing

The cost of memory foam for soundproofing can vary depending on the type of foam, the thickness of the foam, and the size of the area you need to cover. However, in general, memory foam is a relatively affordable soundproofing material.

One of the most important factors that will affect the cost of memory foam is the type of foam you choose. There are two main types of memory foam: open-cell and closed-cell. Open-cell memory foam is more porous and has a lower density than closed-cell memory foam. This makes it more effective at absorbing sound, but it is also less durable. Closed-cell memory foam is more dense and has a higher density than open-cell memory foam. This makes it more durable, but it is also less effective at absorbing sound.

The thickness of the foam will also affect the cost. The thicker the foam, the more effective it will be at soundproofing, but it will also be more expensive.

The size of the area you need to cover will also affect the cost. The larger the area, the more foam you will need, and the more it will cost.

Overall, memory foam is a relatively affordable soundproofing material. However, the cost will vary depending on the type of foam, the thickness of the foam, and the size of the area you need to cover.

Maintenance of Memory Foam for Soundproofing

Memory foam is a relatively low-maintenance material, but there are a few things you can do to keep it in good condition and extend its lifespan.

First, it is important to keep memory foam clean. Dust and dirt can accumulate on the surface of the foam, which can reduce its effectiveness at soundproofing. To clean memory foam, simply vacuum it or wipe it down with a damp cloth.

Second, it is important to keep memory foam dry. Moisture can damage memory foam, so it is important to avoid getting it wet. If memory foam does get wet, dry it off as soon as possible.

Third, it is important to avoid exposing memory foam to direct sunlight. Sunlight can damage memory foam, so it is important to keep it in a shaded area.

By following these simple tips, you can keep your memory foam in good condition and extend its lifespan.

Final Thoughts

Memory foam is an effective soundproofing material due to its ability to absorb and reduce noise. It exhibits linear sound absorption across the frequency spectrum and has a greater noise reduction capacity than other foams. Memory foam’s unique properties make it an ideal choice for soundproofing applications, effectively minimizing noise levels and enhancing acoustic comfort.

Memory foam is a versatile material that can be used for a variety of purposes, including soundproofing. It is an effective soundproofing material because it is dense and absorbs sound waves. Memory foam is also relatively inexpensive and easy to install.

Key Takeaways

• Memory foam is a dense material that absorbs sound waves.
• Memory foam is an effective soundproofing material.
• Memory foam is relatively inexpensive and easy to install.
• Memory foam can be used to soundproof walls, ceilings, and floors.
• Memory foam is a durable material that will last for many years.

Frequently Asked Questions

Is Memory Foam Effective for Soundproofing?

Memory foam is often marketed as having noise-blocking abilities, but the truth is, it falls short as an ideal soundproofing material. While it can help dampen and absorb some sound, it does not effectively block external noises from entering a room.

Should You Use Memory Foam for Soundproofing?

Memory foam can provide some supplemental sound dampening when used strategically in a room. However, relying solely on it mattress toppers or egg crate foam provides very limited noise blocking. Purpose-built soundproofing materials and robust room construction are required to effectively reduce noise transmission.

Does memory foam block all noise?

Memory foam alone does not block all noises. It works best at absorbing medium and high frequency sounds but allows lower frequencies like bass to pass through. For complete sound blocking, it needs to be combined with other materials like mass loaded vinyl.

How thick should memory foam be for soundproofing?

Ideally memory foam should be at least 2-4 inches thick to provide effective noise absorption. Thinner foam under 1 inch will not significantly reduce noise transmission. The thicker the memory foam, the better it performs across the frequency range.

Can you use memory foam mattress toppers for soundproofing?

Memory foam mattress toppers don’t provide enough noise blocking on their own since they are usually less than 2 inches thick. They can help reduce echoes but should be paired with acoustic panels or insulation for meaningful soundproofing.

Is memory foam better than fiberglass for sound absorption?

Memory foam performs better than fiberglass insulation at absorbing low frequency noises. Fiberglass works well for mid-high frequencies but not for blocking lower bass tones. It is also safer to handle and install compared to irritating fiberglass.

Does memory foam lose effectiveness over time?

Memory foam can lose some acoustic performance as it ages and compresses. To maintain noise absorption over years of use, memory foam panels should be replaced as they degrade and become less dense.

Why did NASA use memory foam?

Memory foam was originally developed by NASA researchers looking to improve crash protection and cushioning for aircraft seats and pilot helmets. The unique viscoelastic structure of memory foam allows it to conform to the body and absorb impact forces, making it an effective shock absorber. This innovation later found widespread applications in consumer goods like mattresses, pillows, and padding.

Does memory foam smell?

Memory foam often emits a chemical-like odor when first unpacked due to off-gassing from its manufacturing process. The smell tends to dissipate within a few days as the foam airs out. Using memory foam in a well-ventilated room speeds up the off-gassing process. Some manufacturers also use additives to reduce odor. But an initial smell is common with new memory foam products.