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Interactive effects of intense noise and low-level vibration on tracking performance and response time
522
HUMAN RESPONSE TO VIBRATION
engineers. The limits set to the physicalcharacteristics to be built into the carriage environment by the inevitable variability of capacities and activities of passengers, representing a broad spectrum of the wholepopulation, are discussed.Passengers' feelingsevokedby functional and aesthetic aspects 0f environment will be considered. Topics: Ride (Rail).
Y. Shigeta, M. Hoshi, M. Shichiri, K. Oji, M. Tomobuchi and M. Kosugi 1966 The Journal "of Vitamhwlogy 12, 299-302. Effect of pantethine treatment on vibratory perception in patients with diabetic neuropathy. (4 pages, 3 tables, 6 references) Authors' Summary. Pantethine was administered to patients with diabetic neuropathy in daily doses of 30--200 mg for 20-70 days to study its clinical effectiveness. The substance was found effective in improving the patellar reflex or vibratory perception in extremities in some cases and especially effective against disturbance of vibratory perception in the toe. The increasing ratio of urinary excretion of pyruvate following intravenous injection of fructose was reduced in many cases by pantethine treatment. A correlation was noted between normalization of pyruvate metabolism and improvement in vibratory perception in extremities. Topics: Vibration Sense (Thresholds); Diagnostic Applications. '~
C. S. Harris and H. C. Sommer 1973 Aerospace Medicine 44, 1013-1016. Interactive effects of intense noise and low-level vibration on tracking performance and response time. (4 pages, 4 figures, 2 tables, 7 references) Authors' Abstract. Studies conducted in our laboratory on the combined effects of noise and vibration on tracking performance have yielded both additive and subtractive effects. One reason for the difference in results may be the difference in the intensity levels of the noise used. Subtractive effects were obtained in a recent study using 100 dB noise while additive effects were obtained in another study using 110 dB noise. However, there were additional differences between the studies, other than noise level, that could have accounted for the results. The purpose of the present study was to determine whether the intensity differences in noise level can account for the results. Approximately the same procedures were used in the present study with 110 dB noise as were used previously in a study where a subtractive effect was obtained With 100 dB noise. The performance of 12 subjects was measured during two conditions of noise, 60 dB and 110 dB, and two conditions in which these noise exposures were combined with 0-10 g, (vertical) vibration at 6 Hz. Noise produced a detrimental effect on tracking task performance and the effect was additive to the adverse effect produced by vibration when both noise and vibration were presented simultaneously. These results, along with the results of the previous experiments, demonstrate that as noise level is increased from 100 to 110 dB the combined effect 6f noise and vibration changes from subtractive to additive. Topics: Combhzed Stress (Vibration attd Noise); Performance Effects (Psychomotor). E. A. Drogichina and N. B. Metlina 1967 Gig. Tru. Prof. Zabo111, 27-31. A contribution to the vibration disease classification. (5 pages, 2 references) (In Russian) English Abstract. Since the clinical picture of vibration disease runs a different course depending upon the spectral composition of the acting vibration and may for a long time be attended by functional compensation the authors propose that in the diagnosis of vibration disease the symptoms singled out by them should be adhered to (angiodistonic, angiospastic, vegetative polyneuritis, myofascitis syndrome, that of neuritis, vestibular syndrome and diencephalic one). Each one of the enumerated syndromes reflects a definite stage of vibration
HUMAN RESPONSE TO VIBRATION
engineers. The limits set to the physicalcharacteristics to be built into the carriage environment by the inevitable variability of capacities and activities of passengers, representing a broad spectrum of the wholepopulation, are discussed.Passengers' feelingsevokedby functional and aesthetic aspects 0f environment will be considered. Topics: Ride (Rail).
Y. Shigeta, M. Hoshi, M. Shichiri, K. Oji, M. Tomobuchi and M. Kosugi 1966 The Journal "of Vitamhwlogy 12, 299-302. Effect of pantethine treatment on vibratory perception in patients with diabetic neuropathy. (4 pages, 3 tables, 6 references) Authors' Summary. Pantethine was administered to patients with diabetic neuropathy in daily doses of 30--200 mg for 20-70 days to study its clinical effectiveness. The substance was found effective in improving the patellar reflex or vibratory perception in extremities in some cases and especially effective against disturbance of vibratory perception in the toe. The increasing ratio of urinary excretion of pyruvate following intravenous injection of fructose was reduced in many cases by pantethine treatment. A correlation was noted between normalization of pyruvate metabolism and improvement in vibratory perception in extremities. Topics: Vibration Sense (Thresholds); Diagnostic Applications. '~
C. S. Harris and H. C. Sommer 1973 Aerospace Medicine 44, 1013-1016. Interactive effects of intense noise and low-level vibration on tracking performance and response time. (4 pages, 4 figures, 2 tables, 7 references) Authors' Abstract. Studies conducted in our laboratory on the combined effects of noise and vibration on tracking performance have yielded both additive and subtractive effects. One reason for the difference in results may be the difference in the intensity levels of the noise used. Subtractive effects were obtained in a recent study using 100 dB noise while additive effects were obtained in another study using 110 dB noise. However, there were additional differences between the studies, other than noise level, that could have accounted for the results. The purpose of the present study was to determine whether the intensity differences in noise level can account for the results. Approximately the same procedures were used in the present study with 110 dB noise as were used previously in a study where a subtractive effect was obtained With 100 dB noise. The performance of 12 subjects was measured during two conditions of noise, 60 dB and 110 dB, and two conditions in which these noise exposures were combined with 0-10 g, (vertical) vibration at 6 Hz. Noise produced a detrimental effect on tracking task performance and the effect was additive to the adverse effect produced by vibration when both noise and vibration were presented simultaneously. These results, along with the results of the previous experiments, demonstrate that as noise level is increased from 100 to 110 dB the combined effect 6f noise and vibration changes from subtractive to additive. Topics: Combhzed Stress (Vibration attd Noise); Performance Effects (Psychomotor). E. A. Drogichina and N. B. Metlina 1967 Gig. Tru. Prof. Zabo111, 27-31. A contribution to the vibration disease classification. (5 pages, 2 references) (In Russian) English Abstract. Since the clinical picture of vibration disease runs a different course depending upon the spectral composition of the acting vibration and may for a long time be attended by functional compensation the authors propose that in the diagnosis of vibration disease the symptoms singled out by them should be adhered to (angiodistonic, angiospastic, vegetative polyneuritis, myofascitis syndrome, that of neuritis, vestibular syndrome and diencephalic one). Each one of the enumerated syndromes reflects a definite stage of vibration