scholarly journals The Evaluation of Whole-Body Vibration Level in Hand-Held Pneumatic Tools (Rock Drill) by “Pneurop Cagi Test Code” Method

2009 ◽  
Vol 28 (3) ◽  
pp. 217-221 ◽  
Author(s):  
Farhad Forouhar Majd ◽  
Parvin Nassiri
Keyword(s):  
Whole Body Vibration ◽  
Test Method ◽  
Whole Body ◽  
Exposure Level ◽  
Noise And Vibration ◽  
Body Vibration ◽  
Comfort Index ◽  
Rock Drill ◽  
Important Index ◽  
Industrial Use

The evaluation of whole-body vibration in hand - held pneumatic tools (Rock drills) used in the Lashotor stone mines in Isfahan by the method PNEUROP CAGI (compressed air and gas institute) TEST CODE. This shows the methods for the use of construction equipment in stone mines under work circumstances. This method is designed to evaluate noise and vibration propagated by the hand – held pneumatic tools. Rock Drills are categorized as the major sources of noise and vibration by the Federal noise control Act of 1972. The paper demonstrates vibration values in three directions X, Y, Z and the three vital indices for workers while working with equipment, compared to standard graphs, produced by “Rock Drill” used in the above specified test method. This paper focuses on measurement and prediction of whole -body vibration indices in a rock drill used in stone mines using a B & K vibration meter type 2512. In order to evaluate them we had to record the whole-body acceleration on the ground where the operator was standing and processing his work. The indices include reduced comfort (RC), fatigue decreased proficiency (FDP), and exposure level (EL) for a frequency response of 1–80 Hz shown Table I. As can be seen in table I, there are high values of rms acceleration in the Z and XY axes for exposure level and fatigue decreased proficiency, respectively. All values are based in a 5-hour exposure time. Although we found high levels of vibration in different axes, the most important index in comparison with its recommended limits can be exposure level, because it is a better index weighted for human vibration in workplaces. The reduced comfort index is not recommended for occupational and industrial use.

scholarly journals FARMERS' EXPOSURE TO NOISE AND VIBRATION IN SMALL AND MEDIUM-SIZED FARMS

2018 ◽  
Author(s):  
Ričardas BUTKUS ◽  
Gediminas VASILIAUSKAS
Keyword(s):  
Risk Factors ◽  
Occupational Diseases ◽  
Human Health Risk ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Exposure Level ◽  
Vibration Exposure ◽  
Noise And Vibration ◽  
Body Vibration ◽  
Increased Risk

Occupational noise, hand-arm and whole-body vibration are the main human health risk factors in various economic activity sectors including agriculture. Workers of agricultural sector are usually under increased risk as their exposure to these risk factors is usually longer than reference 8 hours. Moreover, most agricultural activities are related with the processes which include multiple equipment and machinery therefore noise and vibration exposure analysis is a complex issue which is usually undeservedly simplified. This problem can be emphasized by statistical data provided by State Labour Inspectorate of the Republic of Lithuania. Occupational diseases registered for farmers, agricultural and forestry workers consist 16 % of all those registered in Lithuania. Four of five occupational diseases registered in Lithuania are related to vibration and noise (musculoskeletal (66 %) and hearing loss (13 %) and has the increasing tendency over the last years. These tendencies demand a deeper analysis of noise and vibration exposure of farmers and farm workers as obtained results could help to specify the strategy or procedure to reduce negative exposure effects. The results reveal that noise exposure level usually exceed exposure action value of 80 dBA while hand-arm and whole-body vibration exposure limit value of 1.15 and 5 m/s2 respectively.

Vibration Disease: Exposure Level and Duration-Dependent Characteristics and Features of the Clinical Picture Following Local and Combined Local and Whole Body Vibration

2021 ◽  
pp. 30-35
Author(s):  
NP Chistova ◽  
LB Masnavieva ◽  
IV Kudaeva
Keyword(s):  
Clinical Picture ◽  
Work Experience ◽  
Whole Body Vibration ◽  
Occupational Exposures ◽  
Whole Body ◽  
Exposure Level ◽  
Combined Exposure ◽  
Local Vibration ◽  
Body Vibration ◽  
Vibration Disease

Introduction: Vibration disease is induced by a long-term occupational exposure to vibration above the maximum permissible level and is manifested by damage to the peripheral vascular and nervous systems and disorders of the musculoskeletal system. Objective: To study the exposure level and duration dependency and features of the clinical picture of vibration disease in workers exposed to local and combined local and whole body vibration. Materials and methods: The study included 136 male workers. Cohort I consisted of 60 patients (mean age: 49.5 ± 7.4 years) with vibration disease related to the local vibration exposure; cohort II included 76 patients (mean age: 55.7 ± 4.8 years) with vibration disease induced by the combined exposure to hand-arm and whole body vibration. Results: The examined subjects worked in harmful working conditions of classes 3.1–3.4. Measured vibration exceeded maximum permissible values at most workplaces. Levels of local vibration did not differ significantly between the cohorts and amounted to 115.0 and 118.0 dB; the level of whole body vibration in cohort II was 116.0 dB. Shorter work experience and younger age at the time of diagnosing the occupational disease were registered in people exposed to local vibration only compared to those with a combined exposure. The angiodystonic syndrome was twice as frequent in cohort I, while cohort II had a larger proportion of patients with concomitant diseases (low back pain, periarthrosis, etc.). Conclusion: Our findings indicate the necessity to reduce occupational exposures to vibration and take appropriate therapeutic and preventive measures in order to maintain health and work ability of employees.

scholarly journals Evaluation of Whole Body Vibration and Back Pain Problem among Light Rapid Transit (LRT) Drivers

2015 ◽  
Vol 773-774 ◽  
pp. 845-849
Author(s):  
Jalil Azlis-Sani ◽  
Muhammad Firdaus bin Zaid ◽  
Musli Nizam Yahya ◽  
S.M. Sabri S.M. Ismail ◽  
Noor Aqilah Ahmad Tajedi ◽  
...  
Keyword(s):  
Back Pain ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Light Rail ◽  
Rail Transit ◽  
Exposure Level ◽  
Vibration Exposure ◽  
Light Rail Transit ◽  
Body Vibration ◽  
Pain Problem

A cross sectional study was conducted to evaluate whole body vibration (WBV) and back pain problem among light rail transit (LRT) driver. This study was carried out to determine exposure level of whole body vibration and identify back pain problem due to whole body vibration exposure among LRT driver. Standardized Nordic questionnaire was used for the analysis of musculoskeletal symptoms, to identify the prevalence of back pain, information about health history, working time duration, and working experiences was obtained from 52 drivers of light rail transit (LRT) train. HVM 100 Larson Davis was used to measure whole body vibration measurement of eight LRTs with different vehicle number. The measurement of whole body vibration was done during operation working time. The data collected from HVM 100 were transferred to the Blaze software for getting the vibration magnitude of the experiment while data collected from survey were analyzed by using Statistical Package for the Social Sciences (SPSS) for statistical analysis. The analysis of graph patterns and the differentiation of magnitude value from each LRT were studied to determine the exposure level of vibration. A high prevalence of back pain (82.7%) among LRT drivers was found and high daily exposure level was obtained. The finding showed that, there are relations between back pain and daily vibration exposure which resulted in a correlation coefficient of 0.709, with significant at α = 0.05. In conclusion, it was expected that the individuals subjected to the high vibration levels would tend to report back pain.

Practical Aspects of Investingating Complaints from Vibration in Buildings

1995 ◽  
Vol 2 (3) ◽  
pp. 505-519
Author(s):  
Ken Scannell
Keyword(s):  
Environmental Awareness ◽  
Whole Body Vibration ◽  
Building Damage ◽  
Whole Body ◽  
Noise And Vibration ◽  
Body Vibration ◽  
Vibration Theory ◽  
Environmental Vibration

Increasing environmental awareness has resulted in a large increase in the number of complaints about noise and vibration. Although many guidelines exist for noise and many excellent texts are available for vibration theory, few documents covering the practical aspects of investigating environmental vibration are readily accessible. This paper seeks to redress the balance by discussing the investigation of both the fear of building damage from vibration and the effects of whole body vibration within buildings.

scholarly journals Evaluation of Human Discomfort from Combined Noise and Whole-Body Vibration in Passenger Vehicle

2019 ◽  
Vol 16 (2) ◽  
pp. 6808-6824
Author(s):  
M. F. Aladdin ◽  
N. A. A. Jalil ◽  
N. Y. Guan ◽  
K. A. M. Rezali ◽  
S. A. Adam
Keyword(s):  
Noise Exposure ◽  
Whole Body Vibration ◽  
Transportation Systems ◽  
Vertical Vibration ◽  
Comfort Level ◽  
Whole Body ◽  
Vehicle Speed ◽  
Noise And Vibration ◽  
Body Vibration ◽  
Vibration Data

Exposure to noise and whole-body vibration (WBV) has been a key element in determining comfort levels in transportation systems. In the automotive industry, researchers and engineers continuously work on reducing noise and vibration levels to minimize discomfort. Noise annoyance in vehicles results from structure-borne as well as air-borne noise from vehicle powertrain, tires and aeroacoustics. Whole-body vibration affects vehicle passenger comfort at the seat pan, back rest and feet. The objective of this research is to evaluate the comfort level of seated passengers in a vehicle from noise and whole-body vibration by considering both separate and combined modality. The noise and vibration data were recorded and analysed in two vehicles on the same highway road with four different speeds. The vibration exposure in vehicle were evaluated based on ISO2631-1:1997. Noise exposure was based on A-weighted sound pressure level. The combined discomfort on noise and vibration were quantified. The vibration results identified clear dominant of z-axis vertical vibration on seat pan, backrest and feet in both vehicles. The discomfort of combined noise and vibration showed that vehicle B caused a higher discomfort level at the high vehicle speed of 90 km/h and 110 km/h. The Relative Discomfort Indicator (RDI) were introduced to compare levels of discomfort from noise and vibration in different vehicles with varying speeds. The result suggests that the RDI value for vehicle A relative to vehicle B is negative at higher vehicle speed which further indicates that at higher speed, vehicle B have a higher discomfort level compared to vehicle A. The RDI value is expected to be useful for automotive Noise, vibration and harshness (NVH) improvement.

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