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Sensitivity for subliminal flicker

Sensitivity for subliminal flicker. Adverse effects of subliminal flicker Headache Stress Arousal of CNS. Hypotheses Flicker elimination with HF-ballasts has a stress reducing effect

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Sensitivity for subliminal flicker

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  1. Sensitivity for subliminal flicker

  2. Adverse effects of subliminal flicker • Headache • Stress • Arousal of CNS

  3. Hypotheses • Flicker elimination with HF-ballasts has a stress reducing effect • Flicker reduction is also beneficial for those who describe other kinds of building- and work-place related symptoms • Individuals with high CFF is more sensitive than others

  4. Yr 1 Yr 2 O2 O1 X Change of tubes Y Measurement CFF

  5. Measurements Physical Illuminance Luminance Electrical and magnetic fields Individual Experience of the work environment Complaints Personality CFF

  6. Experimental group 3 work places 7 men 35 women Mean age 47 years Control group 7 work places 150 men 140 women Mean age 46 years Subjects

  7. RESULTS

  8. Conclusions • Subliminal flicker causes stress and eye-problems at the work place • There is a tendency toward the existence of a more sensititve group • Flicker maybe a component in the so-called Sick Building Syndrome • More knowledge about the mechanisms causing the effects

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