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Materials with both viscous and elastic characteristics, good for damping vibrations that cause unwanted noise.

Materials that trap sound waves among fibers, converting the acoustic energy into heat.

A special type of plaster designed to allow sound to pass through and be absorbed by an underlying material.

Elastic materials that prevent sound transmission and reduce vibration due to their mass and flexibility.

Materials that absorb sound through viscous and thermal interaction within the pores, often used for soundproofing.

Artificial materials engineered to have properties not found in naturally occurring materials, often manipulating sound waves in unconventional ways.

Panels with small holes that absorb sound due to the friction between air and the panel's surface.

Fabrics that allow sound to pass through for absorption by a backing material, used in decorative acoustical panels.

Designed to target and absorb specific frequencies based on the size of the cavity and neck.

Materials that absorb and release thermal energy during the process of melting and solidifying, affecting acoustic properties.

Bulk materials that slow sound transmission between spaces, typically used in walls and floors of buildings.

Designed to block or reflect sound waves, used along highways and in construction sites to mitigate noise pollution.

Lightweight materials with open-celled structures, which absorb sound waves and dampen echoes.

Combines different materials with distinct acoustic properties to target a broad range of frequencies.

Free-hanging absorbers used in large spaces to control echo and reverberation, improving speech intelligibility.

Materials that change their acoustic properties in response to an external stimulus, such as temperature, electric field, or stress.

Use the resonant properties of materials to absorb specific frequencies of sound, such as panel absorbers and Helmholtz resonators.