highly significantp < 0.001
Threshold shift showed a highly significant difference for all frequencies and for both time points compared to the pre-exposure levels ( p < 0.001).
Threshold shift showed a highly significant difference for all frequencies and for both time points compared to the pre-exposure levels ( p < 0.001).
There was also a strong reduction of SGN densities in the acute group in relation to the control level, although it did not reach statistical significance (71.5 ± 9.0; p = 0.042) ( Fig. 4 ).