"dry" soundproofing is a mat consisting of some sort of fiber like a poly material or fiberglass.
"wet" is tar like and dries after application.
a third is like a thin sheet of foam which has adhesive applied to the back.
Rather than soundproofing the window after the fact, windows are made of soundproof material. You can get information about that here: http://www.soundproofwindows.com/
The cheapest and most effective soundproofing system is to use acoustic insulation. These can be made of minerals, felt, foam or various other materials.
Not necessarily — **soundproofing foam is useful, but it’s not the best or complete solution** for blocking noise. Soundproofing foam (often seen as pyramid or egg-crate panels) is designed mainly for **sound absorption**, not *sound blocking*. This means it helps reduce **echo, reverb, and sound reflections** *inside* a room — making the sound clearer and improving acoustics — but it doesn’t actually stop noise from entering or leaving the space. To **truly soundproof** a room, you need a combination of **mass, isolation, damping, and absorption**. Professional acoustic engineers typically use a mix of the following methods: **Adding Mass:** Using dense materials like soundproof drywall, mass-loaded vinyl (MLV), or double wall layers prevents sound from vibrating through walls. **Decoupling Structures:** Creating air gaps or using resilient channels separates surfaces, reducing vibration transfer between walls or ceilings. **Damping Compounds:** Applying materials like Green Glue between wall layers converts sound energy into heat, minimizing sound transmission. **Sealing Gaps:** Even small openings around doors, windows, and electrical outlets can leak sound. Proper acoustic sealing is essential. **Acoustic Foam & Panels:** These improve room acoustics by controlling reflections and echoes but work best as part of a broader system. So, while **foam panels are great for improving sound quality inside a room**, they **won’t stop loud noises from neighbors, traffic, or machinery** on their own. For true noise isolation, a **professional acoustic engineer** can design a layered solution combining materials and techniques suited to your specific environment. For more please call us today at (416)471-2130
They are made of a special soundproofing material keeping your sound in and other sounds out.
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You can find the best deals on soundproofing foam at www.soundprooffoam.com.
wikipedia has an article on it. G to google, type what is soundproofing, and pick the WISEGEEK ARTICLE
www.betterfoam.com sells soundproofing foam and delivers to Oregon
You can visit www.soundprooffoam.com for all your soundproofing foam needs.
The type of soundproofing that should be used for a basement apartment is by the company Soundproofing. They have many years of experience and offer many services.
Soundproofing walls greatly depends on the thickness of the walls, if it is a temporary soundproofing or a permanent addition and the budget. Information on soundproofing walls in a house can be found online at Home Depot and Lowe's as well as at their retail stores.
Soundproofing foam costs about $50-100 per square feet.