Study of acoustic properties of building materials via FEM/BEM

Abstract

Discordant sound annoys, awakens, angers, distracts, frustrates and creates stresses that result in physiological and psychological problems. It is invisible, yet its effects are clearly evident, and it pervades every facet of life. Results of the acoustic testing of selected mineral based materials used in building construction are presented. The sound absorption and reflection coefficient of the normal incidence sound wave on tested materials in the frequency range of 50 - 6500 Hz were determined. Obtained results were confronted with the theoretical numerical prediction models based on FEM BEM methods as obtained from the SAMCEF software. Obtained results allow optimization of the wall structure construction for household and building industry applications. It's possible to prepare and produce new materials, optionally combinations of existing materials, to improvement damping and vibrating properties.