The project “Valorization of Synthetic Resin Waste”, carried out by the Integrated Solid Waste Management and Circular Economy Research Group of the Environmental Engineering Department of the Institute of Fluid Mechanics and Environmental Engineering of the School of Engineering of the Universidad de la República, aimed to identify viable alternatives for the valorization of waste generated from resin bonded fiberboards. Currently, this type of waste is disposed of directly in the Montevideo sanitary landfill. The characteristic that makes chipboard an attractive option in the market is the use of urea–formaldehyde as a base resin, which complicates the treatment of this waste. This is because although urea–formaldehyde is economical and durable, it is a carcinogenic component, which makes it necessary to eliminate it before considering any possible form of valorization. To identify alternatives, it was essential to conduct laboratory tests with different resin materials to extract as much formaldehyde as possible and obtain fibers from chipboard. Following the capabilities of the Noise Pollution Research Group of the Department of Environmental Engineering to perform evaluations of acoustic materials, priority was given to the valorization of the fibers obtained as raw material for the manufacture of acoustic materials. Impedance tube tests were conducted on two materials derived from the fibers obtained: recycled paper and rice husk. For the acoustic evaluation, the ISO Standard 10534–1:2001 “Determination of sound absorption coefficient and acoustic impedance in impedance tubes” was followed. The results concluded that sample 1 performed better at virtually all frequencies compared to a 25 mm commercial gypsum board. Good insulation performance was observed in the 125 and 250 Hz bands, significantly exceeding the acoustic reduction rates of the reference material. In contrast, sample 2 showed less outstanding performance at low to medium frequencies compared to reference material.