Table 1 HI of different level

Mild (26 - 4 dB)

23

1.47

External auditory canal stenosis

1

Active stage of chronic suppurative otitis media

3

Secretory otitis media

1

Tympanic membrane perforation (dry ear)

1

Tympanosclerosis

1

Hereditary

3

Noise-induced

12

Unknown

1

Moderate (41 - 60 dB)

4

0.26

Tympanosclerosis

1

Hereditary

1

Noise-induced

2

Severe (61 - 80 dB)

2

0.13

Drug-induced

1

Unknown

1

Profound (> 80 dB)

1

0.06

Unknown

1