[navya mathur]

Porous Materials

Soft, porous materials are very good sound absorbers. The basic acoustical characteristic of these materials is a cellular network of interlocking pores. Within these pores, incident sound energy is converted into heat.

Examples of these include acoustical boards, diffusers, soft plasters, mineral wool, and acoustical blankets, among others.

Characteristics:

Their sound absorption is more efficient at high, rather than low frequencies. However, their acoustical efficiency improves in the low frequency range with increased thickness and with distance to their solid backing.

Categories of Commercial Materials:

Pre-fabricated Acoustical Units
Various types of perforated, fissured, or textured materials constitute typical units in this group.

Commonly used materials include:

Acoustical Boards
Acoustic Hangers
Geocoustic Tiles
Diffusers