From: The effect of hearing protection devices on speech intelligibility of Persian employees
HPDs types | With HPDs (%) | Without HPDs (%) | p value | Difference (%) |
---|---|---|---|---|
Earplug A1 | 74.13 ± 4.40 | 72.00 ± 2.70 | 0.15 | 2.13 |
Earplug A2 | 72.80 ± 2.10 | 72.00 ± 2.70 | 0.71 | 0.80 |
Earplug A3 | 72.10 ± 1.10 | 72.00 ± 2.70 | 0.70 | 0.10 |
Earmuff B1 | 73.87 ± 5.60 | 72.00 ± 2.70 | 0.10 | 1.87 |
Earmuff B2 | 72.00 ± 5.20 | 72.00 ± 2.70 | 0.41 | 0.00 |
Earmuff B3 | 72.00 ± 2.20 | 72.00 ± 2.70 | 0.90 | 0.00 |
Prototype earplug | 75.60 ± 3.60 | 72.00 ± 2.70 | 0.10 | 3.60 |