PENENTUAN KOEFISIEN ABSORPSI GELOMBANG BUNYI DARI KERTAS KARDUS

Abstract

A study concerning the absorption of acoustic waves using acoustic panels made from corrugated paper. In this study about absorption of acoustic waves has been carried out by measuring the sound absorption coefficient using corrugated paper as raw material for acoustic panels. The study was conducted by direct measurement in the laboratory using acoustic instruments and measurements obtained from the value level of intensity and level of initial intensity after passing through the material, then the data is equalized using a comparison between the level of intensity of the sound absorbed by the level of intensity of sound that arrives at the surface of the material using Excel and SPSS program to get the value of sound absorption coefficient on the tested material. Material thicknesses used are 0.5 cm to 2 cm, while the frequencies used are 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz. Based on these results, it can be concluded that the highest coefficient was 0.37 and the lowest result was 0.04 which each value coefficient is related to frequency of 2000 Hz with a thickness of 1 cm and a frequency of 125 Hz with a thickness of 0.5 cm