An Analysis of How Physical and Social Factors Influence …
201
Fig. 8 Daily sound level
distribution (o)—control
room; ()—engine room
90
100
110
1
2
3
4
5
6
Day
Noise level (dB).
3.4 Measurement of Crew Members Efficiency
Each subject was asked to complete the Purdue Pegboard test. They were explained
what to do, and they were told they could leave the test anytime they wanted. Using
this test, under the same types of vibration and noise exposure, the following results
were obtained (Fig. 9):
Fig. 9 Number of correct placed nails: ( ■)—Subject 1; ( ■)—Subject 2; ( □)—Subject 3; (
■)—Subject 4; ( ■)—Subject 5; ( ■)—Subject 6
201
Fig. 8 Daily sound level
distribution (o)—control
room; ()—engine room
90
100
110
1
2
3
4
5
6
Day
Noise level (dB).
3.4 Measurement of Crew Members Efficiency
Each subject was asked to complete the Purdue Pegboard test. They were explained
what to do, and they were told they could leave the test anytime they wanted. Using
this test, under the same types of vibration and noise exposure, the following results
were obtained (Fig. 9):
Fig. 9 Number of correct placed nails: ( ■)—Subject 1; ( ■)—Subject 2; ( □)—Subject 3; (
■)—Subject 4; ( ■)—Subject 5; ( ■)—Subject 6