Effect of Air-Craft Noise on Gastric Function.
- Author:
Chae Yun KIM
1
;
Ji So RYU
;
Sa Suk HONG
Author Information
- Publication Type:Original Article
- MeSH: Adult; *Aircraft; Animals; Dogs; Gastric Juice/*secretion; Human; Male; *Noise; Stomach/*physiology
- From:Yonsei Medical Journal 1968;9(2):149-154
- CountryRepublic of Korea
- Language:English
- Abstract: Thirty three healthy young men and six dogs equipped with gastric fistulae were stimulated by noise of 100 to 120 phons emanating from a F-86F jet engine. The basal secretion of gastric juice in the dogs was little changed, but in human subjects the secretion of gastric juice was altered as follows; 30.3% of 33 subjects showed an increased acid output, 63.6% showed a decrease and the remaining showed no change. Furthermore, the basal resting secretion of those showing decreased acidity from noise exposure was higher than that of those showing increased acidity. Gastric motility was greatly inhibited by exposure to noise in both dogs and humans but the inhibition was more sensitive and more prolonged in humans. Rats fed synthetic diet were placed under conditions of repeated noise for either short or long periods and the occurrence of gastric ulcers by the procedure described by Shay et al was observed. The prevalence of ulcer lesions was increased and the severity of the lesion was enhanced in rats exposed to noise for either short or long periods. The above results indicate that the influences of air-craft noise were not remarkable, but the noise to a considerable degree, is responsible for the occurrence of gastric disorders in man. Sound fields surrounding air-craft engines are thought to be the cause of physical or mental disturbances experienced by persons at close range. Laird (1932) reported that 60 decibels of noise decreased the normal secretion of gastric juice in four of five human subjects who previously had been given an Ewald meal and also caused a decrease in the normal secretion of saliva by about 40 per cent. Previously Laird and Smith (1930) had observed that 80 to 90 decibels of noise caused a decrease in gastric motility in human beings. Vaughan and Van Liere (1940) reported a significant reduction in acid secretion in dogs with Pavlov pouches from a noise of l00 decibels and 2,000 frequency. However, noise frequency of 600 was ineffective. The present study was undertaken to determine in humans and animals whether digestive function or other disorders occurred readily with either single or repeated exposure to air-craft noise.
