#TITLE_ALTERNATIVE#

• Main Author: SIMATUPANG (NIM 13605601), VICKY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11555
• Institution: Institut Teknologi Bandung

Noise is one of the pollution sources for people in big cities. This issue certainly has some negative effects in terms of comfort, physical and biological to the society.<p> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Noise reduction can be done in certain ways. One of them is to make an absorber. The material that used in this final project is a composite which base on natural fiber (granule). Natural fiber is used to be a substitute to synthetic material that comes relatively expensive in cost. Besides, we can find it abundantly in our neighborhood.<p> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Impedance tube is one of the method than we can usually use to measure the acoustic level from a composite material. This method is relatively simple and easy to do because we only use a small amount of a material sample (size of the diameter of the impedance tube). Some structural configuration samples have been running on some tests in order to accomplish an optimum absorption coefficient for the absorber composition and structure.