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Table 1 The subjects' speech intelligibility with and without HPDs at S/N = 0

From: The effect of hearing protection devices on speech intelligibility of Persian employees

HPDs types With HPDs (%) Without HPDs (%) p value Difference (%)
Earplug A1 63.20 ± 1.30 62.93 ± 2.90 0.71 0.27
Earplug A2 63.47 ± 6.30 62.93 ± 2.90 0.86 0.54
Earplug A3 63.98 ± 4.80 62.93 ± 2.90 0.88 1.05
Earmuff B1 64.00 ± 3.70 62.93 ± 2.90 0.64 1.07
Earmuff B2 72.00 ± 2.40 62.93 ± 2.90 0.58 9.07
Earmuff B3 72.00 ± 3.40 62.93 ± 2.90 0.13 9.07
Prototype earplug 84.20 ± 3.50 62.93 ± 2.90 0.04 21.27
  1. Italic value inside the table indicating significant difference (p < 0.05)