Physics

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PERBANDINGAN NILAI KOEFISIEN ABSORPSI BUNYI PADA DINDING AKUSTIK PELEPAH KELAPA SAWIT
(Elfitra, 2023-01) Ahlunnazah, Muhammad; Defrianto, Defrianto
Noise is a problem that often occurs in the community, especially those living near factories. This research was conducted to reduce noise pollution by using acoustic walls made from palm fronds. This study used the impedance tube method with two microphones. The acoustic wall sample uses palm fronds mixed with gypsum which has a mass of 0.1 kg of palm fronds and 1 kg of gypsum. The frequencies used are 125 Hz, 250 Hz, 500 Hz, 1000 Hz and 2000 Hz which will be generated from the Signal Generator and will be received by the Sound Level Meter based on the Windows Soundcard Oscilloscope application. The results of this study show that the sound absorption coefficient is the best at a frequency of 250 Hz to 1000 Hz. In this study, it produced a good absorption coefficient value used as a sound absorbing material.