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Figure 1. Differences of noradrenaline excretion (DNA) of workers, working 1 day without ear protectors under noise ( Leq= 95 - 102 dB(A) and 1 day with ear protectors (ÄLeq = 13 dB(A), dependent on the Mg concentration of the red blood cells (Ery Mg).

Figure 1. Differences of noradrenaline excretion (DNA) of workers, working 1 day without ear protectors under noise ( Leq= 95 - 102 dB(A) and 1 day with ear protectors (ÄLeq = 13 dB(A), dependent on the Mg concentration of the red blood cells (Ery Mg).