Frequency (kHz)

0.25

0.5

1

2

4

Average threshold

Affected side

13.1 ± 9.5

18.4 ± 10.8

17.1 ± 12.4

24.7 ± 13.7

24.6 ± 14.7

18.3 ± 10.7

Non-affected side

12.8 ± 7.7

17.1 ± 9.1

16.0 ± 10.6

20.4 ± 10.5**

22.2 ± 14.8

16.6 ± 8.8*

t value

0.33

1.22

0.93

3.51

1.85

3.18

P value

0.74

0.23

0.36

0.001

0.07

0.04