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Browsing by Subject "sound absorption coefficient"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Experimental determination of sound absorbing coefficient for selected granular materials
    (Wydawnictwa AGH, 2009) Sikora, Jan; Turkiewicz, Jadwiga
    The results of investigations of sound absorption coefficients for selected granular materials (potypropylene, polystyrene and garvelite granulates, high-silica sand) being often applied as sound absorbing cores in double-wall partitions are presented in the paper. The results confirmed good sound absorbing properties of granular materials, which placed them in the group of sound absorbing materials applicable in constructions limiting noises of machines and devices.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Sound absorbing materials from recycled rubber products
    (2013) Turkiewicz, Jadwiga; Sikora, Jan
    This paper concerns the results of comparative research into the acoustical properties of rubber granulates derived from the recycling of conveyor belts production waste. In the process of recycling it is possible to obtain pure granulated rubber and forms contaminated with cotton fibres with a predominance of rubber grains or of cotton fabric. Rubber granulate in the contaminated form is characterized by sound-absorbing properties similar to those of the average-quality mineral wool and other fibrous materials. It can be used as the core of sound-absorbing panels in anti-noise protections. The research results can be used both in the design of acoustical protection as well as in the course of the recycling process of other waste products for obtaining materials with sound absorbing properties.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Sound absorption coefficients of granular materials
    (2010) Sikora, Jan; Turkiewicz, Jadwiga
    This paper presents the results of the expanded research program on sound absorbing properties of granular materials (granular polypropylene, foamed polystyrene, gravelite, rubber, mineral wool, and high-silica sand) being often applied as sound absorbing cores in double-wall partitions of constructions limiting noises of machines and devices.