Development of New, High-Performing Sound-Absorbing Materials to Reduce Low-Frequency Noise Abstract The effective control of noise propagation in the workplace is a complex challenge. Knowing that conventional acoustical materials are effective mainly for average and high frequencies, the authors proposed, in a previous project, heterogeneous porous materials that better absorb low frequencies. This publication describes the steps that were followed in modeling and optimizing these materials through laboratory testing. Produced Under this Project Scientific Reports Development of new absorbent materials with high acoustical performances for reducing low frequency noise. Research Report: R-370 Simplified Articles Le matériau absorbant idéal n'existe pas encoreAgir sur les basses fréquences Volume 19, n0 1 Scientific Publications Numerical modeling and experimental investigation of the absorption and transmission loss of heterogeneous porous materialsAtalla N., Amédin C. K., Atalla Y., Osman H.Source : in International Congress on Sound and Vibration / ICSV (10th : July 7-10, 2003 : Stockholm, Sweden), 2003Numerical modeling of heterogeneous porous materialsSgard F., Atalla N.Source : in EuroNoise (May 19-2, 2003 : Naples, Italy), 2003An extension of complex modes for the resolution of finite-element poroelastic problemsDazel O., Sgard F., Lamarque C. H. L., Atalla N.Source : Journal of Sound and Vibration, vol. 253, no 2, 2002, p. 421-445Vibratory behavior of a plate coated with an heterogeneous porous materialSgard F., Atalla N.Source : in InterNoise 2002 (August 19-21, 2002 : Dearborn, Michigan), 2002Use of a hybrid adaptive finite element/modal approach to assess the sound absorption of porous materials with meso-heterogenitiesFranck Sgard, Castel F., Atalla N.Source : Applied Acoustics, vol. 72, no 4, 2011, p. 157-168 Additional Information Type: Project Number: 0099-1300 Status: Completed Year of completion: 2004 Research Field: Mechanical and Physical Risk Prevention Team: Noureddine Atalla (Université de Sherbrooke)Raymond Panneton (Université de Sherbrooke)Celse-Kafui Amédin (Université de Sherbrooke)Franck Sgard (École nationale des travaux publics de l'État)