Characterization of earplugs based on porous polyurethane (PU) and polyvinyl-chloride (PVC) polymers for human ear protectionPenpen Komgue Lucrece Barbara, Safaa Assif, Adil Faiz, Chouaib Ennawaoui, Joël Ducourneau and Abdelowahed HajjajiEur. Phys. J. Appl. Phys., 97 (2022) 48DOI: https://doi.org/10.1051/epjap/2022220104
