Felipetto, T.J., Oliveira, M.F., Rossatto, F.C., Kerber, L.A. and Heissler, R.F. 2021. Attenuators for noise control in air conditioning systems: case study with the use of reused sound-absorbing materials. Acoustics and Vibrations (Acústica e Vibrações). 36, 53 (Dec. 2021), 81–97. DOI:https://doi.org/10.55753/aev.v36e53.30.