Experimental and numerical studies of sound generated by cavities Sebastian Rulik, Włodzimierz Wrόblewski, Mirosław Majkut, Michał Strozik and Krzysztof Rusin E3S Web Conf., 137 (2019) 01011 Published online: 16 December 2019 DOI: 10.1051/e3sconf/201913701011