Table 1: Descriptive analysis and comparison of the arithmetic means, in dB (HL), for the tonal thresholds at the audiometric frequencies of 3, 4, and 6 kHz for each ear, establishing a function and comparing the evaluated sides (profile test by contrasts) ().

Companies Variable Mean SD Minimum Median Maximum

Footwear
R_Mean346
L_Mean346
266
266
10.78
11.21
8.05
8.73
−1.70
−3.30
10.00
10.00
53.30
50.00

Beverage
R_ Mean346
L_ Mean346
150
150
11.60
13.69
9.63
10.57
−3.33
−1.67
10.00
10.84
70.00
63.33

Ceramics
R_ Mean346
L_ Mean346
234
234
11.36
12.98
9.51
11.18
−3.30
−5.00
8.30
10.00
58.30
63.30

Metallurgical
R_Mean346
L_Mean346
1254
1254
11.39
13.03
10.77
10.96
−3.33
−3.33
8.33
10.00
90.00
10.00

Transport
R_Mean346
L_Mean346
236
236
15.66
17.03
10.67
11.44
0.00
−1.67
13.33
15.00
63.33
60.00