“…The addition of the number of layers to the fiber composite has the effect that the higher the fiber volume fraction causes the matrix volume fraction to be less, resulting in weaker bonds between the matrix and the fiber [6] Factors that can affect the acoustic properties of a fiber composite material include fiber size, temperature, porosity, flow resistivity, density, thickness, compression, and design [7]. Composite materials that function well as sound absorbers in the form of determining the properties of fibers, thickness, and density of samples need to be considered [8]. The research on chicken feather fiber developed into composite panels shows that processing conditions, percent weight of reinforcing fiber, thickness, and density have a significant impact on NRC values [9].…”