Analisa Tingkat Reduksi Kebisingan Oleh Bahan Busa Pada Ruang Tertutup Dalam …

Research has been conducted on the foam material using the method of measurement in a confined space to determine the value of sound reduction produced by the speakers at a particular frequency. Specification foam material has a density of consecutive 0,003, , danand has a volume of 20 cm x 20 cm x 1.7 cm. Each sample was measured at a distance of 30 cm, 50 cm and 70 cm from the speaker. The me…