Third Lesson of Acoustic: Acoustic absorption

Assorbimento acustico- terza lezione di acustica

The acoustic absorption is a material’s ability to absorb sound energy. In a closed room, when an acoustic wave hits a perimeter surface, a part of acoustic energy is absorbed and the other part is reflected. The ratio between the absorbed and the reflected energy defines the absorption coefficient.

The absorption coefficients of a material are determined in a reverberation room in accordance with EN ISO 354. This value can be used to specify the project requirements in the acoustic design of a room.

Caruso Acoustic sound-absorbing panels exploit the principle of acoustic absorption in porous media, based on the viscosity of the sound-absorbing material. Thanks to the internal structure in Basotect® by Basf® or Whisper® by Stratocel® melamine resin, the acoustic energy dissipation occurs through the conversion of the acoustic wave into heat due to the friction of micro-cavities, which characterise these fibrous and porous materials.

A correct room design should necessarily focus the attention on finishing materials, which shall ensure an adequate acoustic absorption with regard to the intended use of the space. If it is not possible to renounce to materials without any sound-absorbing capacity, Caruso Acoustic sound-absorbing panels are the ideal solution also for corrective actions after the design phase and are therefore suitable for correcting any acoustic problems to ensure acoustically comfortable spaces.