Frequency

Control ear

Diseased ear

Difference

P value

0.5 KHz

13.15 ± 9.47

14.20 ± 8.98

1.05

0.30

1 KHz

11.95 ± 8.34

13.85 ± 7.38

1.9

0.03*

2 KHz

14.90 ± 12.03

18.85 ± 10.63

3.95

0.001**

4 KHz

16.60 ± 11.36

21.05 ± 12.83

4.45

0.001**