Investigation of the sound intensity level in the case of a universal lathe Sergiu-Constantin Olaru, Laurențiu Slătineanu, Manuela Silitră, Andrei-Marius Mihalache and Margareta Coteață MATEC Web Conf., 112 (2017) 01025 Published online: 03 July 2017 DOI: 10.1051/matecconf/201711201025