Styrofoam is ineffective for soundproofing. Because it is lightweight, rigid, and closed-cell, it actually reflects sound waves. Instead of stopping noise, it can vibrate and cause hollow resonance.
Styrofoam soundproofing can help reduce echoes and minor noise, but it is not a complete solution for blocking loud sounds. Its lightweight structure absorbs some sound waves, making it suitable for home studios, small offices, or hobby rooms where full isolation is not required.
The "best" sound deadening material depends on your goal and the application—whether you want to stop vibrations in a car, block noise in a home, or absorb echoes in a studio. For vehicles, the gold standards are butyl-based damping mats paired with closed-cell foam.
Sound cannot travel through a vacuum. Because sound is a mechanical wave that propagates by vibrating particles, it requires a physical medium like a solid, liquid, or gas to carry those vibrations. Since a vacuum is completely empty space lacking matter, sound waves have no particles to push against and cannot propagate.
Best solutions: High-NRR foam earplugs — Foam earplugs with a Noise Reduction Rating (NRR) of 30+ dB are highly effective at blocking mid-frequency sounds.
Mass-Loaded Vinyl (MLV) – Best for Blocking Sound
While it's more affordable than some high-end soundproofing materials, it remains highly effective for walls, ceilings, or floors. If you need a cost-effective way to reduce sound transmission, installing MLV is an excellent choice.
Popular noise-canceling headphones
To block noise from a shared wall, you need to address two primary elements: air gaps (where sound travels through open spaces) and vibrations (where sound transfers through studs). The most effective approach combines heavy, dense materials with acoustic seals.
Soundproofing on a budget relies on adding mass, sealing air gaps, and absorbing echoes. Because sound travels like air, the cheapest solutions focus on blocking those pathways. The most effective budget methods cost under $50 to $100 and can be done in an afternoon:
Sound-absorbing materials for the home generally fall into two categories: acoustic treatments (which reduce echoes and improve sound clarity) and soundproofing (which physically blocks noise from entering or leaving a room).
To soundproof a wall cheaply, focus on sealing gaps and adding mass. The cheapest way to reduce noise is to seal the perimeter and outlets with Acoustical Solutions, hang heavy blankets, or place a tall bookshelf full of books against the wall.
Of all sound absorbing materials, I consider fiberglass, mineral wool, and foam to stand out above the rest. Foam is a material made up of polymers, typically polyurethane, that form a structure of cells.
Drywall is superior to plywood for soundproofing. Because sound blocking requires heavy, dense materials to reflect and dampen sound waves, drywall’s high-density gypsum core makes it the industry standard for reducing noise transmission. Plywood transfers sound more easily, though layering both can maximize versatility.
One of the primary drawbacks to using styrofoam is that it isn't very durable or long-lasting. Over time, it can start to break down due to normal wear and tear or exposure to extreme temperatures. This means you may need to replace your insulation sooner than expected if you opt for styrofoam.
Soundproof (acoustic) foam does not block noise from entering or leaving a room. Instead, it absorbs sound waves to reduce echo and reverberation inside the space. If you want to stop outside noise from bothering your neighbors or vice versa, foam will not solve your problem.
A 2-inch thick sheet of rigid foam insulation typically provides an R-value ranging from R-8 to R-10, depending on the type of material. The exact thermal resistance depends on the specific foam manufacturing type:
Effective DIY soundproofing requires either adding dense mass to block sound waves or sealing air gaps. The most impactful DIY strategies are sealing door gaps with Audimute Acoustic Door Seal Kit or draft stoppers, hanging heavy moving blankets, and placing thick bookshelves against shared walls.
The best and cheapest sound absorbing materials (meant to stop echoes and improve room acoustics) include DIY acoustic panels using Rockwool, moving blankets, thick rugs, and acoustic foam panels. For the highest performance on a budget, building DIY panels out of Roxul/Rockwool remains the most effective method.
A DIY solution to stop soundwaves travelling from room to room is to use large items of furniture against adjoining walls. Large built-in bookshelves full of books can dampen considerable noise from neighbours. Large cupboards or even free standing bookshelves will help to create a soundproof effect.
For existing walls: Add mass-loaded vinyl to either side. If you're ready to do some renovating: Build an extra layer, forming a room within a room. You can also apply acoustic paint to reduce vibrations.
Often, people create excessive holes for pipes and cables. Cracks around the window frames are another common mistake found in offices and households—proper soundproofing demands sealing all the cracks. Professionals often use weather stripping, acoustic sealants, and even door sweeps to seal all the gaps.
While dealing with disruptive apartment neighbors can be tricky, here are some tips for handling your noisy neighbors in healthy, legal ways.
The best active noise cancellation (ANC) is highly dependent on whether you need over-ear headphones for travel and deep focus, or in-ear earbuds for workouts and daily commutes.
Some potential drawbacks and expert warnings include: Ear pressure sensation: Many people feel a “suction” or fullness. Overuse risks: Excessive ANC use might affect auditory processing in the brain. Physical discomfort: Long sessions can lead to ear fatigue or headaches.