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Figure 1: Included earplugs (1 to 5). Between brackets, the approximative maximal diameter of the plug fi tting the ear canal is given, followed by the length of the stem for the musician earplugs. (a) Earplug 1 (11 mm; 4 mm); (b) Earplug 2 (13 mm; 16 mm); (c) Earplug 3 (9 mm; 16 mm); (d) Earplug 4 (11 mm; 8 mm); (e) Earplug 5 (11 mm)

Figure 1: Included earplugs (1 to 5). Between brackets, the approximative maximal diameter of the plug fi tting the ear canal is given, followed by the length of the stem for the musician earplugs. (a) Earplug 1 (11 mm; 4 mm); (b) Earplug 2 (13 mm; 16 mm); (c) Earplug 3 (9 mm; 16 mm); (d) Earplug 4 (11 mm; 8 mm); (e) Earplug 5 (11 mm)