Practical Aspects of Investingating Complaints from Vibration in Buildings

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.

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

Journal of Low Frequency Noise Vibration and Active Control ◽

10.1260/026309209790252554 ◽

2009 ◽

Vol 28 (3) ◽

pp. 217-221 ◽

Cited By ~ 1

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.

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

Proccedings of International Scientific Conference "RURAL DEVELOPMENT 2017" ◽

10.15544/rd.2017.059 ◽

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.

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

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.16.2.2019.25.0512 ◽

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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