Harmonic pollution filtering: case study of a university campus Ali Boharb, Ismail Moufid, Naciri Soukaina, El Markhi Hassane, El Moussaoui Hassan and Lamhamdi Tijani E3S Web Conf., 351 (2022) 01005 Published online: 24 May 2022 DOI: 10.1051/e3sconf/202235101005