Analysis of sound absorption coefficient (Case study: Gypsum panel, gypsum-palm fiber, palm fiber-gypsum, foam concrete-palm fiber)

This research was conducted to analyze the absorption coefficients of sound at several types of materials as well as its combinations. The aim of this research was to find the value of sound absorption coefficients on the materials and its combinations. The materials used in this research were gypsum panel, gypsum-fiber palm, fiber palm-gypsum, and foamed concrete-fiber palm. The test was conducted by using a method of reverberation chamber based on the ISO 354-1985 with the types of the sound source: white noise and pink noise at frequency of 125 Hz – 8000 Hz. Based on the test results of white noise, it was found that the panel of gypsum-fiber palm has α = 0.93 at low frequency; the panel of fiber palm has α = 0.97 at medium frequency; and the panel of foamed concrete-fiber palm has α = 0.89 at high frequency. Further, for the sound source of pink noise, it was found that the panel of gypsum-fiber palm has α = 0.99 at low level; the panel of fiber palm-gypsum has α = 0.86 at medium level; and the panel of fiber palm-gypsum has α = 0.64 at high level. The fiber Continue reading “Analysis of sound absorption coefficient (Case study: Gypsum panel, gypsum-palm fiber, palm fiber-gypsum, foam concrete-palm fiber)”