ASSESS THE GAMELAN APPEAL MADE OF STEEL, TIN BRONZE, SILICONE BRONZE TO THE RESULT OF LONG SOUND (RESONANCE) AND SOUND INTENSITY (DECIBEL)

Abstract

This study aims to determine the effect of material differences in the composition of gamelan materials to acoustic properties of long sound results (resonance) and the intensity of sound (decibels). Steel, bronze tin white and silicone bronze are the material studied in Javanese gamelan gong kempul barrel 5 slendro. Making gamelan using sandcasting casting process. Then do the process of forging to get the form of the gamelan made. Gamelan is then tested by using Neundo software and some tools are: software, condenser microphone, audio interface and cable. The results of this study show the longest resonance in silicone bronze gamelan with an average sound duration of 15.4 seconds, gamelan bronze white tin material with a sound duration of 7.4 seconds and gamelan iron material with a duration of 6.6 seconds. The sound intensity resulting from the silicon bronze gamelan has a gain value of -23.34 dB. While in gamelan of white tin bronze material equal to -21,68 dB and gamelan of iron material has gain value equal to -17,96 dB. With the tests performed then the results obtained differences and increase the quality of resonance and sound intensity