The Effects of Noise and Vibration on Psychomotor Efficiency PDF Download
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Author: National Research Council (U.S.). Committee on Sound Control in Vehicles
Publisher:
ISBN:
Category :
Languages : en
Pages : 113
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Book Description
Author: National Research Council (U.S.). Committee on Sound Control in Vehicles
Publisher:
ISBN:
Category :
Languages : en
Pages : 113
Get Book Here
Book Description
Author: National Research Council (U.S.). Committee on Sound Control Vehicles
Publisher:
ISBN:
Category : Movement, Psychology of
Languages : en
Pages : 234
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Author: Stanley Smith Stevens
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ISBN:
Category : Motor ability
Languages : en
Pages : 18
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Author: C. Stanley Harris
Publisher:
ISBN:
Category :
Languages : en
Pages : 29
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Book Description
Tracking performance and reaction time to the appearance of a light (red lights) and disappearance of a light (green lights) of highly trained subjects were measured during four experimental conditions. There were two conditions of 85 dB and 110 dB broadband noise exposure, and two conditions in which these noise exposures were combined with 0.25G vertical vibration at 5 Hz. Duration of exposure for each condition was 19 minutes. Vibration was found to have an adverse effect on both the horizontal and vertical dimensions of the tracking task and on reaction time to both sets of lights. Noise had a significant effect, both with and without vibration, but only on the vertical part of the tracking task. On vertical tracking, the detrimental effect of noise was additive to that of vibration when both noise and vibration were presented simultaneously (110dB noise and 0.25G vertical vibration at 5 Hz). (Author).
Author: Don Lewis
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ISBN:
Category :
Languages : en
Pages :
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Author: John Robert Doering
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Category : Light, Physiological effects
Languages : en
Pages : 56
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Author: Priscilla J. Hambrick Dixon
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Category :
Languages : en
Pages :
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Author: David F. Champion
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Category :
Languages : en
Pages : 594
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Author: C. Stanley Harris
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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Two experiments were conducted to determine the combined effects of noise and vibration on mental performance. In experiment 1, ten subjects were tested on a combination short term memory and subtraction task during exposure to four different intensities of broadband noise. Another group of ten subjects was tested using the same noise intensities in combination with 0.25g (peak) vertical vibration at 5Hz. Noise alone, and vibration with low level noise (80 dB and 90 dB re 0.0002 dyne/sq cm) had no adverse effects on task performance while the highest level of noise (110 dB) combined with vibration to produce a significant reduction in the number of correct responses. In experiment 2, the second group of subjects used in experiment 1 was tested during exposure to the following conditions: no vibration (control), vibration at 5 Hz - 0.25g, 7 Hz - 0.30g, and 11 Hz - 0.50g, all combined with 80 dB noise. Subsequently these same vibration conditions were presented with 107 dB noise. High intensity noise and vibration combined to produce a greater decrement in performance than either stressor alone. Vibration at 5 Hz was a more sensitive frequency for mental subtraction performance than 7Hz and 11 Hz when the three frequencies were presented in conjunction with high intensity noise. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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In order to gain a better understanding of how to optimize the performance of personnel operating military vehicles, where exposure to noise & vibration is a problem, it is important to consider the effects of realistic levels of noise & vibration. This paper presents an overview of previous studies of communication & cognitive performance in noise & vibration, including studies of speech intelligibility in noise and of the effects of whole body vibration, noise, and their combination on task performance. It also suggests directions for future research.
