Abstract
This paper reports on an investigation of the acoustical performance of loose cork granulates. This investigation is based on the physical parameters of loose granular cork obtained through an empirical model of the acoustic properties of loose granular media shown by Voronina and Horoshenkov and the experimental performance of these granulates. The performance is assessed according to ISO 10534-2 (1998). The data obtained show clearly that this porous absorber exhibits high sound absorption performance varying with particle size. The relationship between the experimental and the model results demonstrates the existence of significant differences between particle sizes >3.5 mm. Finally, the performance of this material is compared to other granular materials.
Similar content being viewed by others
References
Boutin C, Royer P, Auriault JL (1998) Acoustic absorption of porous surfacing with dual porosity. Int J Solids Struct 35(34–35):4709–4737
Brown JS (1980) Connection between formation factor for electrical resistivity and fluid–solid coupling factors in Biot’s equations for acoustic waves in fluid-filled porous media. Geophysics 45(8):1269–1275
Castro O, Silva JM, Devezas T, Silva A, Gil L (2010) Cork agglomerates as an ideal core material in lightweight structures. Mater Des 31:425–432
Ersoy S, Küçük H (2009) Investigation of industrial tea-leaf-fibre waste material for its sound absorption properties. Appl Acoust 72:215–220
Fatima S, Mohanty AR (2011) Acoustical and fire-retardant properties of jute composite materials. Appl Acoust 72:108–114
Fernandes EM, Correlo VM, Chagas JAM, Mano JF, Reis RL (2011) Properties of new cork–polymer composites: advantages and drawbacks as compared with commercially available fibreboard materials. Compos Struct 93:3120–3129
Freitas E, Oliveira J, Machado P (2012) Innovative low noise road pavement materials studied in Portugal. J Acoust Soc Am 131(4):3225
Glé P, Gourdon E, Arnaud L (2001) Acoustical properties of materials made of vegetable particles with several scales of porosity. Appl Acoust 72:249–259
Hong Z, Bo L, Guangsu H, Jia H (2007) A novel composite sound absorber with recycled rubber particles. J Sound Vib 304:400–406
Horoshenkov KV, Swift MJ (2001) The effect of consolidation on the acoustic properties of loose rubber granulates. Appl Acoust 62:665–690
Hosseini Fouladi M, Ayub MD, Jailani Mohd Nor M (2011) Analysis of coir fiber acoustical characteristics. Appl Acoust 72:35–42
International Organization for Standardization ISO 10534-2 (1998) Acoustics—determination of sound absorption coefficient and impedance in impedance tubes. Part 2: transfer function-method. International Organization for Standardization, Geneva
Johnson DL, Plona TJ, Scala C, Pasierb F, Kojima H (1982) Tortuosity and acoustic slow waves. Phys Rev Lett 49:1840–1844
Macías-García A, Díaz-Díez MA, Cuerda-Correa EM, Díaz-Parralejo A, Gómez-Serrano V (2009) Use of cork agglomerates as acoustic absorbents. Mater Technol 24(2):114–118
Maderuelo-Sanz R, Martín-Castizo M, Vilchez-Gómez R (2011) The performance of resilient layers made from recycled rubber fluff for impact noise reduction. Appl Acoust 72:823–828
Maderuelo-Sanz R, Nadal-Gisbert AV, Crespo-Amorós JE, Parres-García F (2012) A novel sound absorber with recycled fibers coming from end of life tires (ELTs). Appl Acoust 73:402–408
Maderuelo-Sanz R, Barrigon JM, Martín-Castizo M, Gómez V, Rey G (2013) Acoustical performance of porous absorber made from recycled rubber and polyurethane resin. Lat Am J Solids Struct 10:585–600
Oldham DJ, Egan CA, Cookson RD (2011) Sustainable acoustic absorbers from the biomass. Appl Acoust 72:350–363
Pereira H (2007) Cork: biology, production and uses. Elsevier, Amsterdam
Rives J, Fernandez-Rodriguez I, Gabarrell X, Rieradevall J (2012) Environmental analysis of cork granulate production in Catalonia—Northern Spain. Resour Conserv Recycl 58:132–142
Vasina M, Hughes DC, Horoshenkov KV, Lapcík L Jr (2006) The acoustical properties of consolidated expanded clay granulates. Appl Acoust 67:787–796
Voronina NN, Horoshenkov KV (2003) A new empirical model for the acoustic properties of loose granular media. Appl Acoust 64:415–432
Voronina NN, Horoshenkov KV (2004) Acoustic properties of unconsolidated granular mixes. Appl Acoust 65:673–691
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Maderuelo-Sanz, R., Barrigón Morillas, J.M. & Gómez Escobar, V. Acoustical performance of loose cork granulates. Eur. J. Wood Prod. 72, 321–330 (2014). https://doi.org/10.1007/s00107-014-0784-x
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00107-014-0784-x