Number (n)

Frequency (%)

BIAT classification

Normal hearing: ≤20 dB (A)

7

12.28

Mild deafness: [21 - 40] dB (A)

36

63.16

Moderate deafness: [41 - 70] dB (A)

14

24.56

Classification according to intervention threshold

No intervention: <25 dB (A)

18

31.58

Action on the environment: [25 – 35[ dB (A)

22

38.60

Worker withdrawal: ≥35 dB (A)

17

29.82