Journal of Applied Physiology AJP: Lung Cellular and Molecular Physiology
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J Appl Physiol 49: 985-993, 1980;
8750-7587/80 $5.00
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Journal of Applied Physiology, Vol 49, Issue 6 985-993, Copyright © 1980 by American Physiological Society

ARTICLES

Extra-auditory responses to long-term intermittent noise stimulation in humans

B. Fruhstorfer and H. Hensel

Respiration, heart rate, cutaneous blood flow, and electroencephalogram (EEG) reactions to long-term intermittent noise exposure were recorded from 13 volunteers (20-29 yr) with normal hearing and vegetative reactivity. They received daily within 1 h 12 noise stimuli (16 s 100 dB (A) white noise) for 10 or 21 days, respectively. Most subjects reported partial subjective adaptation to the noise. Heart rate adapted within a session but did not change considerably during successive days. Vascular responses did not change during one session but diminished mainly during the first 10 days. Noise responses in the EEG remained constant, but a decrease in vigilance occurred during the whole experimental series. Respiration responses were unpredictable and showed no trend within the sessions. It was concluded that certain physiological responses adapt to loud noise but that the time course of adaptation is different. Therefore a general statement about physiological noise adaptation is not possible.




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