scholarly journals Evaluation of Noise Level at the Position of Water Cutter Operator at Selected Enterprise

2019 ◽  
Vol 2 (2) ◽  
pp. 341-349
Author(s):  
Michał Pałęga ◽  
Marcin Kwapisz
Keyword(s):  
Work Environment ◽  
Noise Level ◽  
Noise Exposure ◽  
Sound Level ◽  
Exposure Level ◽  
Basic Information ◽  
Computer Service ◽  
Measurement Results ◽  
The Subject

Abstract The subject of this publication is to assess the exposure of the waterjet operator to the noise hazard. The publication presents basic information about noise in the work environment. Next, the procedure of noise measurement in the work environment was discussed and the results of tests carried out at the waterjet operator’s station for three basic activities were presented, ie: (1) plotter support, supervision of the cutting process, loading and receiving material, (2) auxiliary, transport and cleaning, (3) computer service, keeping documentation, hygienic and social break. The noise level test included the determination of: the maximum sound level A LA max, the peak sound level C LCpeak, the noise exposure level related to the 8-hour work day LEX,8h. Based on the obtained measurement results, it can be stated that the exposure to noise at the station of the waterjet operator is at an acceptable level.

scholarly journals Perbaikan Tingkat Kebisingan pada Ruang Produksi Yessy’s Collection dengan Pendekatan Ergonomi

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Afgan Suffan Aviv ◽  
Bambang Suhardi ◽  
Pringgo Widyo Laksono
Keyword(s):  
Work Environment ◽  
Noise Level ◽  
Threshold Value ◽  
Sound Level ◽  
Physical Work ◽  
Level Measurement ◽  
Measurement Results ◽  
Physical Work Environment ◽  
Level Meter ◽  
Physical Environmental Factors

<p><em>Implementation of ergonomics is generally a design or redesign. One of them may include the design of the physical work environment. Ergonomic work environment conditions are provide comfort and security for workers. Physical environmental factors that can affect the comfort and safety of noise level.  A good physical work environment will increase work capability or labor productivity. In a work environment, workload assessment can also be carried out to measure worker conformity and comfort. Workload assessment is carried out simultaneously with measurement of noise level . </em></p><p><em>Whose problematic noise, the industry is located in Tawangsari RT 03 RW 34 Mojosongo, Jebres, Surakarta named Yessy's Collection. Measurement of noise level to improve worker comfort, so that productivity increases. The methode used is measurement using 4 in 1 Environment on sound level meter function illustrated with Software Surfer 11.</em></p><em> The noise level measurement results are below the specified threshold value except at 1 coordinate in swabing station (stasiun penyesekan),that is  at above threshold value. To proposed improvements as noise control is engineering control, administrative control and use of PPE</em>

scholarly journals 2D and 3D mapping of traffic induced noise near major roads passing through densely populated residential area of South Delhi, India

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248939
Author(s):  
Pervez Alam ◽  
Kafeel Ahmad ◽  
Afzal Husain Khan ◽  
Nadeem A. Khan ◽  
Mohammad Hadi Dehghani
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Standard Procedure ◽  
Sound Level ◽  
Exposure Level ◽  
Residential Areas ◽  
Noise Levels ◽  
Night Time ◽  
Noise Mapping ◽  
Regulatory Standards

Noise monitoring and mapping is the critical processes to ensure that the noise level does not reach the harmful levels and provides noise exposure level details. 2-D and 3-D noise mapping has been carried out at pre-selected critical locations of major roads passing through densely populated residential areas, namely, Mathura Road, Lodhi Road, Lala Lajpat Rai Road, and Ring road, along with significant intersections, viz. Moolchand, Ashram, Sabz Burj, and Lodhi road. The monitoring has been performed during the day and night’s peak traffic hours using Sound Level Meter (SLM) Larson & Davis 831as per standard procedure. Then after, 2-D and 3-D noise maps have been prepared, visualized, and analyzed by soundPLAN (acoustic) and MapInfo Pro (Desktop GIS). The maximum noise level is observed at Ashram Chowk [81.1 dB (A)] at 8 pm; however, the minimum noise level is found to be at Lala Lajpat Rai Road [76.4dB (A)] at 7 pm. Monitoring results of noise level show non-compliance of regulatory standards for day time and night time. 2-D noise maps revealed that the noise level is maximum at the centerline of the road and decreases either side with the distance, and remains above the permissible limits at all locations. However, the 3-D noise maps show horizontal as well as vertical noise levels at all locations. The 3-D noise maps also revealed a noise level of 70 dB (A) up to a height of 6.096m at the Ashram Chowk and Moolchand intersection. However, a noise level of 65 dB (A) has been observed at the height of 5.486m at Lala Lajpat Rai Marg and Sabz Burj. This study will explore noise levels in both horizontal and vertical directions near roads surrounded by high-rise buildings. It will help the decision-makers take remedial measures.

Statistical Analysis of the Equivalent Noise Level

2015 ◽  
Vol 39 (2) ◽  
pp. 195-198 ◽  
Author(s):  
Wojciech Batko ◽  
Bartosz Przysucha
Keyword(s):  
Statistical Analysis ◽  
Probability Density Function ◽  
Normal Distribution ◽  
Probability Density ◽  
Noise Level ◽  
Sound Level ◽  
Uncertainty Calculation ◽  
Measurement Results ◽  
Interval Value

Abstract The authors focus their attention on the analysis of the probability density function of the equivalent noise level, in the context of a determination of the uncertainty of the obtained results in regard to the control of environmental acoustic hazards. In so doing, they discuss problems of correctness in the applicability of the classical normal distribution for the estimation of the expected interval value of the equivalent sound level. The authors also provide a set of procedures with respect to its derivation, based upon an assumption of the determined distribution of the measurement results. The obtained results then create the plane for the correct uncertainty calculation of the results of the determined controlled environmental acoustic hazard coefficient.

scholarly journals Repeated Noise Exposure Does Not Reach Hazardous Levels During Total Joint Arthroplasty

2020 ◽  
Vol 185 (9-10) ◽  
pp. e1551-e1555
Author(s):  
Sean E Slaven ◽  
Benjamin M Wheatley ◽  
Daniel L Christensen ◽  
Sameer K Saxena ◽  
Robert J McGill
Keyword(s):  
Noise Exposure ◽  
Weighted Average ◽  
Sound Level ◽  
Health Concern ◽  
Exposure Level ◽  
Total Knee ◽  
Time Weighted Average ◽  
Exposure Levels ◽  
Occupational Standards ◽  
Level Meter

Abstract Introduction Noise exposure is an occupational health concern for certain professions, especially military servicemembers and those using power tools on a regular basis. The purpose of this study was to quantify noise exposure during total hip arthroplasty (THA) and total knee arthroplasty (TKA) cases compared to the recommended standard for occupational noise exposure. Materials and Methods A sound level meter was used to record cumulative and peak noise exposure levels in 10 primary THA and 10 primary TKA surgeries, as well as 10 arthroscopy cases as controls. Measurements at the distance of the surgeon were taken in all cases. In TKA cases, measurements were taken at 3 feet and 8 feet from the surgeon, to simulate the position of the anesthetist and circulating nurse, respectively. Results Time-weighted average was significantly higher in THA (64.7 ± 5.2 dB) and TKA (64.5 ± 6.8 dB) as compared to arthroscopic cases (51.1 ± 7.5 dB, P &lt; 0.001) and higher at the distance of the surgeon (64.5 ± 6.8 dB) compared to the anesthetist (52.9 ± 3.8 dB) and the circulating nurse (54.8 ± 11.2 dB, P = 0.006). However, time-weighted average was below the recommended exposure level of 85 dB for all arthroplasty cases. Peak levels did not differ significantly between surgery type or staff role, and no values above the ceiling limit of 140 dB were recorded. Surgeon’s daily noise dose percentage per case was 1.78% for THA and 2.04% for TKA. Conclusion Noise exposure in THA and TKA was higher than arthroscopic cases but did not exceed occupational standards. A daily dose percentage of approximately 2% per case indicates that repeated noise exposure likely does not reach hazardous levels in modern arthroplasty practice.

Sound influence on spa park perception in feelings of visitors

2017 ◽  
Author(s):  
Małgorzata Sztubecka ◽  
Maria Mrówczyńska ◽  
Anna Bazan-Krzywoszańska ◽  
Marta Skiba
Keyword(s):  
Human Perception ◽  
Special Kind ◽  
Sound Level ◽  
Health Resort ◽  
Measurement Results ◽  
Noise Measurements ◽  
Permissible Levels ◽  
The One ◽  
The Impact

Noise can have many harmful effects on the recipients, however people exposed to noise on a long-term and regular basis can get used to it, even if the permissible levels are exceeded. In cities, green areas and park systems are provided to create a climate for rest and relaxation. Spa parks are a special kind of such park systems, which – in addition to the above-mentioned features – support therapies offered by spa facilities located there. On the one hand, patients and visitors appreciate various social and entertainment events held there, but – on the other – a multitude of sounds associated with them may reduce the comfort of their stay. The aim of this paper is to analyse the relationship between the results of noise measurements and the human perception of noise within the impact zone. The examined area is a spa park in the health resort district of Inowrocław, where seasonal measurements (taken in summer and winter) provided a basis for the determination of the connection between the measured values of equivalent sound level and the noise level perceived by surveyed people. A statistical analysis was performed to take into account the correlation between the obtained measurement results and the human perception of noise. It shows some differences in the perception of heard sounds. The results allow an evaluation of the soundscape of the analysed area.

Evaluation of Noise Characteristics of Drainage and Water Supply Systems in Apartment Bathrooms

2014 ◽  
Vol 1025-1026 ◽  
pp. 987-990
Author(s):  
Jun Oh Yeon ◽  
Kyoung Woo Kim ◽  
Kwan Seop Yang ◽  
Byung Kwon Lee
Keyword(s):  
Water Supply ◽  
Noise Level ◽  
Drainage System ◽  
Low Noise ◽  
Sound Level ◽  
Water Supply Systems ◽  
Apartment Building ◽  
Noise Characteristics ◽  
Measurement Results ◽  
Supply Systems

We have developed a low-noise drainage system, which was installed in bathrooms of apartment building units as well as in a mock-up test building, to evaluate the noise level in order to reduce the noise produced in the bathrooms of multiunit dwellings. The drainage system installed in the mock-up building consists of six types of detachable drains, and the level of noise produced during toilet use in the upper unit was measured in the lower unit. The measurement results showed that low-noise drainage 4 exhibited the Leq(equivalent continuous sound level) at 34.7 dB(A). The noise measurement results of various types of low-noise drains installed in an apartment building showed that the Leqduring toilet use was 46.7 dB(A) on average, and the Leqduring sink use was 40.5 dB(A) on average.

scholarly journals Lowering the level of occupational exposure to noise in areas neighbouring compressor halls

2020 ◽  
Vol 305 ◽  
pp. 00044
Author(s):  
Sorin Simion ◽  
Alexandru Simion ◽  
Izabella Kovacs ◽  
Vlad Lautaru
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Working Environment ◽  
Exposure Level ◽  
Occupational Hazards ◽  
Limit Values ◽  
Occupational Noise Exposure ◽  
Legal Provisions ◽  
Acoustic Comfort ◽  
Noise Measurements

A general problem in the vicinity of industrial compressors is the noise generated in the working environment by their operation. A large number of workers suffer from hearing problems caused by exposure to high levels of noise in the workplace. Thus, legal provisions regulating occupational noise exposure aim to reduce the risk of hearing loss by reducing noise level, the most effective measures being those applied directly to the noise source combined with the use of hearing protection. Quantification of noise exposure level and mitigation of occupational hazards generated by it at each workplace is required in order to prevent accidents and occupational diseases. The current paper analyses how noise generated by industrial compressors influences worker’s activity. Prevention of noise exposure must be based on noise level measurements. In this sense, the purpose of the paper is to analyse noise measurements performed at a compressor hall and to compare the values obtained with limit values set by in force legislation, in order to apply the best technical organizational methods for lowering noise exposure and increasing acoustic comfort in order to improve working conditions of those working in the compressor hall.

Temporary Threshold Shift following 24-Hour Noise Exposure

1977 ◽  
Vol 86 (6) ◽  
pp. 821-826 ◽  
Author(s):  
William Melnick
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Sound Field ◽  
Threshold Shift ◽  
Exposure Level ◽  
Temporary Threshold Shift ◽  
Octave Band ◽  
Straight Line ◽  
Hearing Thresholds ◽  
Continuous Noise

Nine men were exposed to 24 hours of continuous noise in a sound field. The noise was an octave band centered at 4 kHz at levels 80 and 85 dB. Hearing thresholds were measured monaurally at 11 test frequencies ranging from 250 to 10000 Hz before, during, and after exposure. Temporary threshold shift (TTS) reached maximum levels at 8 to 12 hours of exposure. Maximum TTS occurred at 4 and 6 kHz. Mean asymptomtic threshold shifts (ATS) resulting from the 80 dB exposure level were 9.3 dB for 4 kHz and 7.2 dB for 6 kHz. For the 85 dB noise level, these threshold shifts were 17.8 dB and 14.6 dB respectively. The increase in ATS with increase of noise level for these two frequencies could be fitted with a straight line having a slope of 1.6.

scholarly journals Evaluation of Workers and Customers Exposure to Noise Level in Delta Mall and Robinson Plaza, Delta State, Nigeria

2018 ◽  
Vol 7 (2) ◽  
pp. 122-130
Author(s):  
Ado Umar Farouq ◽  
Peter I Ahonsi
Keyword(s):  
Risk Assessment ◽  
Noise Level ◽  
Noise Exposure ◽  
Noise Pollution ◽  
Exposure Level ◽  
Average Dose ◽  
Exposure Limits ◽  
Entire Study ◽  
Action Value ◽  
Entire Study Area

This research work titled “Evaluation of Noise Exposure Level in Delta Mall and Robinson Plaza” was aimed at the determination of the noise exposure level and it’s implication to the health of workers/individuals in Delta Mall and Robinson Plaza. A sound level meter (SLM) of model 407736 was used to measure the noise level in Delta Mall and Robinson Plaza. At Robinson plaza, the noise was measured in 13 different locations and they are numbered Block A – N with an exception of Block I. The procedure was carried out in the morning (9:00am – 9:30am), afternoon (1:00pm – 1:30pm), and evening (6:00pm – 6:30pm) measurements for a period of 30 days. The noise exposure level of the entire study area for Robinson Plaza, revealed an average dose of 177.2% and equivalent TWA of 94.1 dBA for 12 hours duration per day and when compared with OSHA standard, it exceeded the exposure action value in the OSHA noise exposure limits (90 dBA for 8 hours duration per day), hence, a detailed risk assessment must be completed for the entire Robinson Plaza. While the noise exposure level of the entire study area for Delta Mall, revealed an average dose of 115.5% and equivalent TWA of 91.0 dBA for 12 hours duration per day and when compared with OSHA standard, it exceeded the exposure action value in the OSHA noise exposure limits (90 dBA for 8 hours duration per day), hence, a detailed risk assessment must be completed for the entire Delta Mall. It’s therefore concluded that the noise generated from both Delta Mall and Robinson Plaza can be harmful to the health of workers. It was recommended that due to these possible effects of noise pollution on the populace, the following action should be carried out: Isolate noise at source, Using protection equipment, Urgent need for legislation to control noise pollution, and Public awakening and education.

scholarly journals Acoustic Environment and Noise Exposure in Fitness Halls

2020 ◽  
Vol 10 (18) ◽  
pp. 6349
Author(s):  
Omaimah Ali Al-Arja
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Subjective Rating ◽  
Reverberation Time ◽  
Noise Levels ◽  
Acoustic Environment ◽  
Exposure Limit ◽  
Raising Awareness ◽  
Measurement Results ◽  
T Values

People seek health and leisure in gyms and fitness halls. In this study, interior acoustics including reverberation time (T) and activity noise levels were studied in 20 indoor sports and gymnasium (IS & G) halls in Amman, Jordan. Interviews and questionnaires were also applied to assess the subjective comfort levels of the acoustic environment in these IS & G halls. The measured values were correlated with the subjective evaluations. The range of measured T values was 1.09–5.38 s. The activity noise level, which was measured with LA,eq over 50 min of activity, ranged between 80.0 and 110.0 dB(A). The average personal noise exposure for instructors was 92.6 dB(A), ranging from 81.0 to 108.0 dB(A), whereas 90% of the measurement results were above the occupational exposure limit (OEL) of 85.0 dB(A), and 40% of instructors were potentially exposed to excessive noise levels. The subjective rating of listening conditions correlated significantly with the reverberation time rather than noise level (p < 0.01). In conclusion, the results from this study show that noise levels generated in the studied IS & G halls present a possible workplace noise hazard. Raising awareness of the risk of hearing problems among instructors working in IS & G halls is highly recommended.

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