(EN) Elliott H. Berger, Jérémie Voix, Chapter 11: Hearing Protection Devices, in D.K. Meinke, E.H. Berger, R. Neitzel, D.P. Driscoll, K. Bright (a cura di), The Noise Manual, 6th ed., Falls Church, Virginia, American Industrial Hygiene Association, 2018, pp. 255–308. URL consultato il 10 agosto 2022.