Table 1.

Evaluation of noise levels (Anonymous, 1996)

Levels	Noise level dB(A)	Consequences
1.Level	30–65	Confusion, discomfort, anger, sleep, etc., disorders
2.Level	65–90	Physiological responses
3.Level	90–120	Increased physiological responses, headaches
4.Level	> 120	Permanent damage to internal ear and balance deterioration
5.Level	> 140	Serious brain destruction