Table 2. Mean and Standard Deviation of Latency Time Wave V in Milliseconds (ABR Test), Before and 14 Days After Exposure in Experimental Groups.
| Frequency, kHz | Latency Time Wave V, ms | P value | |
|---|---|---|---|
| Before Exposure (Baseline), Mean ± SD | 14 Days After Exposure, Mean ± SD | ||
| Group 1 (Control) | |||
| 1 | 4.77 ± 0.020 | 4.77 ± 0.022 | 1.175 |
| 2 | 4.74 ± 0.019 | 4.74 ± 0.020 | 1.175 |
| 4 | 4.71 ± 0.016 | 4.71 ± 0.016 | 1.363 |
| 8 | 4.67 ± 0.014 | 4.67 ± 0.014 | 1.175 |
| Group 2 (Noise + Saline) | |||
| 1 | 4.77 ± 0.020 | 5.30 ± 0.014 | < 0.001 |
| 2 | 4.74 ± 0.019 | 5.32 ± 0.015 | < 0.001 |
| 4 | 4.71 ± 0.016 | 5.74 ± 0.29 | < 0.001 |
| 8 | 4.67 ± 0.014 | 5.49 ± 0.035 | < 0.001 |
| Group 3 (Noise + NAC a) | |||
| 1 | 4.79 ± 0.027 | 5.03 ± 0.027 | 1 |
| 2 | 4.76 ± 0.030 | 5.08 ± 0.030 | 1 |
| 4 | 4.74 ± 0.034 | 5.23 ± 0.076 | 0.087 |
| 8 | 4.68 ± 0.035 | 5.27 ± 0.017 | < 0.001 |
| Group 4 (NAC a) | |||
| 1 | 4.77 ± 0.038 | 4.77 ± 0.036 | 0.175 |
| 2 | 4.74 ± 0.030 | 4.75 ± 0.033 | 0.093 |
| 4 | 4.71 ± 0.024 | 4.72 ± 0.026 | 0.081 |
| 8 | 4.67 ± 0.028 | 4.67 ± 0.034 | 0.126 |
aAbbreviation: NAC, N-acetylcysteine