What commonly used material is known for acoustic insulation?

Mineral wool, often referred to as rock wool or stone wool, is recognized for its excellent acoustic insulation properties. It is manufactured from natural or synthetic minerals and fibers, and its structure is composed of microscopic air pockets that effectively absorb sound waves. This makes it particularly useful in construction applications where noise reduction is a priority, such as in walls, ceilings, and floors of buildings.

Mineral wool not only helps in reducing sound transmission between spaces but also provides thermal insulation, enhancing energy efficiency in buildings. The density and fibrous structure of mineral wool are specifically designed to trap sound, making it a preferred material for soundproofing various environments.

While fiberglass also provides some degree of acoustic insulation and is commonly used in many applications, mineral wool typically offers superior sound absorption characteristics. Plywood, while strong and versatile for structural applications, does not serve as an acoustic insulator. Similarly, concrete, although robust for structural integrity, is generally not conducive to sound absorption due to its density and rigidity, often resulting in sound reflection rather than absorption.