Pine (P. pinaster) and quebracho (S. lorentzii) tannin-based foams as green acoustic absorbers - Archive ouverte HAL
Article Dans Une Revue Industrial Crops and Products Année : 2015

Pine (P. pinaster) and quebracho (S. lorentzii) tannin-based foams as green acoustic absorbers

Résumé

Open cells structure tannin-furanic foams prepared using two different types of tannins have been shown to give good sound absorption/acoustic insulation characteristics at medium and high frequencies (1000-4000 Hz) with coefficients of acoustic absorption of 0.85-0.97. Their acoustic absorption coefficient was lower 0.40-0.60 at lower frequencies (250-500 Hz). Compared with commercial foams, tannin-furanic foams have the same typical behavior of light porous materials. The more open-cell is the material the better is its sound absorption. Thicker samples absorb better at medium frequencies for all types of porous material tested.
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Dates et versions

hal-01294760 , version 1 (29-03-2016)

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Clément Lacoste, M. -C. Basso, A. Pizzi, Alain Celzard, E. Ella Ebang, et al.. Pine (P. pinaster) and quebracho (S. lorentzii) tannin-based foams as green acoustic absorbers. Industrial Crops and Products, 2015, 67, pp.70-73. ⟨10.1016/j.indcrop.2014.12.018⟩. ⟨hal-01294760⟩
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