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Table 1 Frequency range limits in sleeping areas

From: The use of a bed with an insulating system of electromagnetic fields improves immune function, redox and inflammatory states, and decrease the rate of aging

  No concern Slight concern Severe concern Extreme concern
Electric Fields
 With grounding cable (V/m) < 1 1–5 5–50 > 50
 Potential-free (V/m) < 0.3 0.3–1.5 1.5–10 > 10
Magnetic Fields (nT) < 20 20–100 100–500 > 500
High frequency (μW/m2) < 0.1 0.1–10 10–1000 > 1000