scholarly journals OCCUPATIONAL NOISE LEVEL IN MECHANIZED AND SEMIMECANIZED HARVEST OF COFFEE FRUITS

2018 ◽  
Vol 13 (4) ◽  
pp. 448
Author(s):  
José Antonio Ramos da Silva ◽  
Geraldo Gomes de Oliveira Júnior ◽  
Carlos Emanual de Melo Costa ◽  
Adriano Bortolotti da Silva ◽  
Camila Pires Cremasco Gabriel ◽  
...  
Keyword(s):  
Noise Level ◽  
Occupational Noise ◽  
Noise Levels ◽  
Homogeneous Groups ◽  
Field Calibration ◽  
Personal Use ◽  
Hearing Health ◽  
Working Day ◽  
Coffee Cultivation

<span lang="EN-US">Coffee cultivation has undergone significant changes, especially with regard to the mechanization process of the various existing operations that were previously carried out manually by the workers. It is observed that the intensification of mechanized activities can expose workers to noise levels capable of compromising their hearing health. In this sense, the objective of the present study was to determine the level of occupational noise in the activities of mechanized and semi-mechanized harvesting of coffee fruits and compare them with the limits of tolerance of the current legislation. The occupational noise level was determined considering the exposure of homogeneous groups, using an integrative meter for personal use, noise dosimeter, electromechanically calibrated and with field calibration. The results demonstrate that the noise levels found are above the limits allowed for an 8-hour working day. The highest observed level was 100.66 dB (A) in the sweeping operation with the blower equipment and the lowest level 89.05 dB (A) in the auxiliary activity of the selected collection equipment Vicon H3000. Harvesting activity with a portable </span><span lang="EN-US">mechanical stripper <span>equipment showed a noise level 4.07% higher compared to harvesting with automotive harvester equipment.</span></span>

scholarly journals NOISE LEVELS EMITTED BY AGRICULTURAL TRACTORS WITH AND WITHOUT IMPLEMENTS ACTIVATION

Nativa ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 413-418
Author(s):  
Amanda Pereira Assis Gomes ◽  
Gabriel Araújo e Silva Ferraz ◽  
Diego Bedin Marin ◽  
Fabiano Battemarco da Silva ◽  
Luana Mendes dos Santos ◽  
...  
Keyword(s):  
Rural Areas ◽  
Noise Level ◽  
Sound Pressure ◽  
Noise Levels ◽  
Regulatory Standard ◽  
Level Data ◽  
Hearing Protectors ◽  
Acoustic Comfort ◽  
Working Day ◽  
Agricultural Tractors

Níveis de ruído emitidos por tratores agrícolas com e sem acionamento de implementos Os níveis de ruído emitidos pelas máquinas agrícolas podem ser prejudiciais à saúde do trabalhador e, por vezes, negligenciados no meio rural. Este trabalho teve como objetivo mensurar os níveis de ruído emitidos por três tratores agrícolas de diferentes potências acionando dois tipos de implementos para avaliar se havia riscos à saúde dos operadores e trabalhadores de apoio ao redor da operação. Os dados de ruído foram coletados por decibelímetro em dez pontos de cada lado da máquina (frente, trás, esquerda e direita) para um total de 40 pontos ao redor de cada trator. Três tratores diferentes foram avaliados em diferentes cenários: sem implemento, acoplando e acionando uma esparramadora de corretivo e acoplando e acionando uma enxada giratória. O trator foi estacionado no centro da mistura com uma rotação do motor que garantiu 540 rotações por minuto (RPM). para a tomada de potência (TDP) durante toda a coleta de dados. Os dados foram analisados ​​por meio de gráficos, regressão linear e análise de agrupamento hierárquico. Os resultados indicaram que os níveis de pressão sonora em todas as situações estudadas ultrapassam os limites da norma regulamentadora (NR) 15, tornando os protetores auditivos indispensáveis ​​durante a jornada de trabalho. Palavras-chave: ergonomia; conforto acústico; mecanização agrícola; nível de pressão sonora.   ABSTRACT: The noise levels emitted by agricultural machines can be harmful to the worker's health, and it is sometimes neglected in rural areas. This work aimed to measure the noise level emitted by three agricultural tractors of different power activating two types of implements to assess whether there were risks to operators' health and the supporter workers around the tractor. The noise level data were collected using a decibel meter in ten points on each machine side (forward, rear, left, and right) for a total of 40 points around each tractor. Three different tractors were evaluated in different scenarios: without any implement, coupling and activating a spreader, and coupling and activating a rotary hoe. The tractor was parked at the centre of the mash with an engine speed that ensured 540 rotation per minute (RPM). to the power take-off (PTO) during the entire data collection. The data were analyzed by charts, linear regression, and hierarchical clustering analysis. The results indicated that the sound pressure levels in all of the studied situation exceed the standard's limits regulatory standard 15, making hearing protectors essential during the working day. Keywords: ergonomics; acoustic comfort; agricultural mechanization; sound pressure level.

scholarly journals Investigation of Exposure to Occupational Noise among Forestry Machine Operators: A Case Study in Brazil

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 299
Author(s):  
Diego Aparecido Camargo ◽  
Rafaele Almeida Munis ◽  
Danilo Simões
Keyword(s):  
Occupational Noise ◽  
Noise Levels ◽  
Planted Forests ◽  
Homogeneous Groups ◽  
Brazilian Legislation ◽  
Exposure Limit ◽  
Safety And Health ◽  
Machine Operators ◽  
Full Day

In mechanized harvesting of wood operations, in a cut-to-length system, occupational noise is emitted by self-propelled forest machines, which compromises the safety and health of operators. Therefore, the occupational noise levels emitted by self-propelled forestry machines, in a cut-to-length system, were investigated to determine which are in line with current Brazilian legislation. The noise levels issued by 22 self-propelled forestry machines in the mechanized harvesting of wood operations, in Eucalyptus and Pinus planted forests, were collected during a full day of measurement. Taking into account the operations performed and the type of planted forest, homogeneous groups of operators were formed. Based on Regulatory Norms N.9 and N.15 adopted for labor purposes in Brazil, occupational noise levels were analyzed. In relation to harvester operators, 36.4% were exposed to values above the exposure limit of 85 dB (A) and 63.6% to the action level of 80 dB (A). Regarding the forwarder operators, 100% were exposed to values that exceeded the action level. For the analyzed conditions, for the cut-to-length system employed in harvesting wood in forest planted with Eucalyptus and Pinus, the occupational noise levels of the self-propelled forest machines are not in line with current Brazilian legislation for labor purposes.

Noise level monitoring of different zone of Haridwar (Uttarakhand), India

2017 ◽  
Vol 2 (01) ◽  
pp. 92-95
Author(s):  
Himanshu Kaushik ◽  
Sudhanshu Kaushik ◽  
Pankaj Saini
Keyword(s):  
Noise Level ◽  
Noise Levels ◽  
Working Day ◽  
Study Sites ◽  
Level Monitoring

In the present study, noise levels were measured in different zones within Haridwar city viz., industrial, residential, commercial and silence zone, on working day and non working day (Holiday of Sunday) in August 2016. The results show that the noise level of study sites is higher during the working day as compared to non working day, except residential zone. Keywords: Traffic, means of entertainment.

Noise level monitoring of different zone of Haridwar (Uttarakhand), India

2018 ◽  
Vol 3 (01) ◽  
pp. 90-93
Author(s):  
Himanshu Kaushik ◽  
Sudhanshu Kaushik ◽  
Pankaj Saini
Keyword(s):  
Noise Level ◽  
Noise Levels ◽  
Working Day ◽  
Study Sites ◽  
Level Monitoring

In the present study, noise levels were measured in different zones within Haridwar city viz., industrial, residential, commercial and silence zone, on working day and non working day (Holiday of Sunday) in August 2016. The results show that the noise level of study sites is higher during the working day as compared to non working day, except residential zone.

scholarly journals Flour Mill Workers Occupational Noise Exposure in Chandrapur City, Central India

2018 ◽  
Vol 7 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Namrata R. Nimgade ◽  
R. K. Kamble
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Central India ◽  
Sound Level ◽  
Shop Floor ◽  
Occupational Noise ◽  
Noise Levels ◽  
Occupational Noise Exposure ◽  
Flour Mill ◽  
Grinding Machines

Assessment of occupational noise exposure of flour mill workers in Chandrapur city of central India was carried out during November 2015-January 2016. Total 62 flour mills were selected for this study comprising one, two and three grinding machines operating in the shop floor. The sound level meter was used to measure sound level at 50 cm and 3 meters from grinding machines at receiver’s position during operation. Noise monitoring was also recorded when one, two and three machines were operating individually and simultaneously. The results showed that noise levels when one grinding machine in operation in close proximity (50 cm) was in the range of 80-97 dB(A). Comparison of these observations with that of 3 meters distance; it was observed that noise levels got reduced and in the range of 70-77 dB(A). In the case of two machines in operation, it was in the range of 95-118 dB(A) at 50 cm distance and reduced to 75-95 dB(A) at 3 meters distance. This reduction in noise level was due to the propagation of noise in the ambient environment. Furthermore, daily noise exposure points, exposure points job per task and exposure points per hour were computed by using noise exposure calculator developed by Health and Safety Executive (HSE), United Kingdom. The computation from this calculator revealed that these attributes were directly depended upon noise levels in flour mills and duration of noise exposure. A positive linear Pearson’s correlation (p<0.01) was observed between noise level and exposure points per hour. Of the 65 flour mill workers surveyed, 70.76% reported a hearing problem, 23.07% headache at work and out of which 7.69% workers headache remains after completion of work also. Remedial measures to control noise exposure to flour mill workers such as ear plugs, ear muff, semi-insert are recommended.

scholarly journals Noise in Otolaryngology – Head and Neck Surgery operating rooms: a systematic review

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Gianluca Sampieri ◽  
Amirpouyan Namavarian ◽  
Marc Levin ◽  
Justine Philteos ◽  
Jong Wook Lee ◽  
...  
Keyword(s):  
Systematic Review ◽  
Head And Neck ◽  
Patient Outcomes ◽  
Noise Level ◽  
Neck Surgery ◽  
Operating Rooms ◽  
Head And Neck Surgery ◽  
Noise Levels ◽  
Surgical Performance ◽  
The Mean

Abstract Objective Noise in operating rooms (OR) can have negative effects on both patients and surgical care workers. Noise can also impact surgical performance, team communication, and patient outcomes. Such implications of noise have been studied in orthopedics, neurosurgery, and urology. High noise levels have also been demonstrated in Otolaryngology-Head and Neck Surgery (OHNS) procedures. Despite this, no previous study has amalgamated the data on noise across all OHNS ORs to determine how much noise is present during OHNS surgeries. This study aims to review all the literature on noise associated with OHNS ORs and procedures. Methods Ovid Medline, EMBASE Classic, Pubmed, SCOPUS and Cochrane databases were searched following PRISMA guidelines. Data was collected on noise measurement location and surgery type. Descriptive results and statistical analysis were completed using Stata. Results This search identified 2914 articles. Final inclusion consisted of 22 studies. The majority of articles analyzed noise level exposures during mastoid surgery (18/22, 82%). The maximum noise level across all OHNS ORs and OHNS cadaver studies were 95.5 a-weighted decibels (dBA) and 106.6 c-weighted decibels (dBC), respectively (P = 0.2068). The mean noise level across all studies was significantly higher in OHNS cadaver labs (96.9 dBA) compared to OHNS ORs (70.1 dBA) (P = 0.0038). When analyzed together, the mean noise levels were 84.9 dBA. Conclusions This systematic review demonstrates that noise exposure in OHNS surgery exceeds safety thresholds. Further research is needed to understand how noise may affect team communication, surgical performance and patient outcomes in OHNS ORs. Graphical abstract

Effective splicing localization based on noise level inconsistencies

2021 ◽  
pp. 1-11
Author(s):  
P. N. R. L. Chandra Sekhar Author ◽  
T. N. Shankar Author
Keyword(s):  
Digital Technology ◽  
Social Networking Sites ◽  
Noise Level ◽  
Research Work ◽  
Multimedia Content ◽  
Noise Levels ◽  
Multimedia Forensics ◽  
The Past ◽  
Photo Editing ◽  
State Of Art

In the era of digital technology, it becomes easy to share photographs and videos using smartphones and social networking sites to their loved ones. On the other hand, many photo editing tools evolved to make it effortless to alter multimedia content. It makes people accustomed to modifying their photographs or videos either for fun or extracting attention from others. This altering brings a questionable validity and integrity to the kind of multimedia content shared over the internet when used as evidence in Journalism and Court of Law. In multimedia forensics, intense research work is underway over the past two decades to bring trustworthiness to the multimedia content. This paper proposes an efficient way of identifying the manipulated region based on Noise Level inconsistencies of spliced mage. The spliced image segmented into irregular objects and extracts the noise features in both pixel and residual domains. The manipulated region is then exposed based on the cosine similarity of noise levels among pairs of individual objects. The experimental results reveal the effectiveness of the proposed method over other state-of-art methods.

scholarly journals Characterization of Noise Level Inside a Vehicle under Different Conditions

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2471 ◽  
Author(s):  
Daniel Flor ◽  
Danilo Pena ◽  
Luan Pena ◽  
Vicente A. de Sousa ◽  
Allan Martins
Keyword(s):  
Regression Analysis ◽  
Noise Level ◽  
Acoustic Noise ◽  
Experimental Setup ◽  
Strongly Correlated ◽  
Noise Levels ◽  
Noise Sources ◽  
Statistical Tools ◽  
Window Position

Vehicular acoustic noise evaluations are a concern of researchers due to health and comfort effects on humans and are fundamental for anyone interested in mitigating audio noise. This paper focuses on the evaluation of the noise level inside a vehicle by using statistical tools. First, an experimental setup was developed with microphones and a microcomputer located strategically on the car’s panel, and measurements were carried out with different conditions such as car window position, rain, traffic, and car speed. Regression analysis was performed to evaluate the similarity of the noise level from those conditions. Thus, we were able to discuss the relevance of the variables that contribute to the noise level inside a car. Finally, our results revealed that the car speed is strongly correlated to interior noise levels, suggesting the most relevant noise sources are in the vehicle itself.

Noise Pollution in Onitsha Metropolis: Challenges and Solution

2021 ◽  
Vol 1 (2) ◽  
pp. 032-040
Author(s):  
Chris Onyeka Ekweozor ◽  
Johnbosco Emeka Umunnakwe ◽  
Leo O Osuji ◽  
Vincent C Weli
Keyword(s):  
State Government ◽  
Noise Level ◽  
Control Point ◽  
Noise Pollution ◽  
Health Impact ◽  
Dry Season ◽  
Noise Levels ◽  
Wet Season ◽  
High Noise ◽  
Anambra State

This study evaluated noise pollution in Onitsha metropolis, Anambra State, Nigeria in 2019. Noise levels were measured at forty sampling stations in the morning, afternoon and night within the study area for dry and wet seasons using modern noise level instruments. A control point was established at ldeani/Nnobi Junction with coordinates N 06o 05’.282’’ E 006o 55’.891’’ which was used as a reference point and for comparison with the sound levels recorded in designated locations. The results showed that the maximum noise level in the study area exceeded the Federal Ministry of Environment (FMEnv) limit by 7.8% in the dry season and by 13.11% in the wet season. Noise LAeq exceeded the NESREA LAeq limit by 29.89% in the dry season and by 33.44% in the wet season. The study indicated that the mean noise levels in the dry and wet seasons were within FMEnv limit of 90dB .It also showed that high noise levels were recorded around major junctions and market places within Onitsha, which are harmful to public health. The study further showed that transportation activities and trading activities at the market places are the main sources of high noise levels in the study area. Health impact assessment should be conducted in Onitsha metropolis for residents. State government should enforce compliance laws and regulate the activities of industries in the areas.

The variability of naturally occurring magnetic field levels: 10 Hz to 8 kHz

Geophysics ◽  
2010 ◽  
Vol 75 (6) ◽  
pp. F187-F197 ◽  
Author(s):  
Ben K. Sternberg
Keyword(s):  
Magnetic Field ◽  
Noise Level ◽  
Monsoon Season ◽  
Signal Frequency ◽  
Time Interval ◽  
Frequency Range ◽  
Noise Levels ◽  
Controlled Source ◽  
Naturally Occurring ◽  
Minimum Noise

The variability of naturally occurring magnetic fields in the frequency range from [Formula: see text] over a period of one year was studied. Contour plots for the [Formula: see text], [Formula: see text], and [Formula: see text] components and for frequencies of 10, 100, 1000, 2000, and 8000 Hz were produced. Average, minimum, maximum, and the standard deviations of these fields were also calculated for 12 distinctive time intervals. In the 1– to 8–kHz frequency range, the noise levels are typically higher at night. In the 10- to 100-Hz frequency range, the noise levels are typically higher during the day. During mid- to late-summer, there is frequent thunderstorm activity, known in the southwest United States as the monsoon season. The magnetic field levels are often very high during this time period. These variability ranges can be used to estimate the lowest levels of noise that may be encountered during field surveys, which iswhat the authors are looking for when running controlled-source electrical method surveys. These variability ranges can also be used to estimate the highest levels that may be encountered, which is what the authors are looking for when running natural-source electrical methods surveys, such as audio frequency magnetotelluric (AMT) surveys. These measurements of magnetic field strength variability show that better data for controlled-source electrical measurements can be obtained using the minimum noise level measurements, as opposed to using signal integration or signal averaging with all of the data. The minimum noise level is found by using frequency bins adjacent to the signal-frequency bin. Likewise, if one is interested in measuring the naturally occurring magnetic field data, using the maximum values during each time interval makes AMT measurements possible when the natural signal level is very low, particularly in the AMT dead zone around [Formula: see text].

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