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Table 2: Manufacturer's specifications of the attenuation ability of the ER-15 earplugs (in dB), and the group-level real-ear attenuation at threshold measurement results by measured frequencies of the 15 orchestra musicians studied

Table 2: Manufacturer's specifications of the attenuation ability of the ER-15 earplugs (in dB), and the group-level real-ear attenuation at threshold measurement results by measured frequencies of the 15 orchestra musicians studied