Perancangan Tabung Impedansi dan Kajian Eksperimental Koefisien Absorpsi Paduan Aluminium-Magnesium

Abstract

People do not like noise. By definition, it is unwanted sound. Noise control play an important role in creating an acoustically pleasing environtment. This can be achieved when the intensity of sound is brought down to a level that is not harmful to human ears. Achieving a pleasing environment can be obtained by using various techniques. One such technique is by absorbing the sound. This paper review how the influence by adding magnesium can change the absorption behavior of aluminium. So that aluminium-magnesium alloy can be used as acoustic materials to reduce noise. The result showed the increase of sound absorption value as the composition of magnesium increased. Sound absorption coeficient of aluminium-magnesium alloy show a good result in the middle and higher frequency.