“…Composite materials basically consist of a binder (reinforcement) and reinforcement (matrix). The matrix that is often used in research is the polymer matrix, which has several types, such as epoxy, polyester, bhispenol, and repoxy (Kurniawan et al, 2019). Composite materials with the main element being fiber, the binding material can be a polymer which has properties including Meldawati Artayani, Asniawaty Kusno, Nurul Jamala, Rosady Mulyadi Type on the Sound Absorption Coefficient Chicken Feather Composite being light, corrosion resistant, strong enough, cheap, non-magnetic and easy to shape into complex shapes.…”