Spatial variability of noise level in agricultural machines

Yanagi, Tadayuki; Schiassi, Leonardo; Rossoni, Diogo Francisco; Ponciano, Patrícia Ferreira; Lima, Renato Ribeiro de

doi:10.1590/s0100-69162012000200002

Cited by 15 publications

(9 citation statements)

References 15 publications

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“…The semivariogram is represented by the graph γ(h) versus h. With the adjustment of a mathematical model to the calculated values of γ(h), the coefficients of the theoretical model were estimated for the semivariogram. They are: nugget effect (C 0 ); sill (C 0 + C 1 ) and range, as described by Yanagi Junior et al (2012).…”

Section: Methodsmentioning

confidence: 99%

“…It should be emphasized that most of the studies that evaluated the noise produced by agricultural machines using geostatistics conformed to the Gaussian model (Pimenta Junior et al, 2012;Yanagi Junior et al, 2012;Missio et al, 2015;Spadim et al, 2015). Ferraz et al (2013) analyzed the noise of portable coffee harvesters and assembled the spherical model.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of noise emitted by a power tiller through geostatistics

Gonçalves

Ferraz

Oliveira

et al. 2019

Rev. bras. eng. agríc. ambient.

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Noise is one of the harmful and stressful physical agents present in the workplace. Research performed with geostatistics to adjust the semivariogram of tractor noise were performed using the Gaussian and spherical model. In this way, the aim was to map the spatial variability of the noise emitted by a power tiller through the sine wave model, besides testing other fitting methods, in order to identify health zones for the workers. The experiment was performed with an agricultural power tiller (10.3 kW) placed in a working regime (1500 rpm), coupled to a brushcutter, and a digital sound level meter to collect noises in points distributed along a regular grid sampling of 2.0 × 2.0 m around the tractor. The spatial dependence of noise was analyzed through semivariogram fitting by different methods and by the wave model to obtain the spatial distribution map interpolated by kriging. It was possible to characterize the structure and the magnitude of the spatial dependence of the noise levels emitted by the tractor, as well as to map the spatial distribution. A maximum noise level of 96.5 dB was observed close to the tractor engine, a value above the limit of 85.0 dB for 8 h of daily exposure (NR-15). Thus, the use of ear protectors is recommended for both the tractor driver and the professionals who support agricultural operation within a radius of 6 m from the emitting source under the conditions studied.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of noise emitted by a power tiller through geostatistics

Gonçalves

Ferraz

Oliveira

et al. 2019

Rev. bras. eng. agríc. ambient.

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“…Informações relacionadas à ergonomia e segurança, visam fornecer orientações sobre o uso adequado de máquinas agrícolas para usuários, e permite a otimização de sistemas que propiciem maior conforto e segurança aos seus operadores (Cunha et al, 2012). No caso do efeito de ruídos sonoros, a norma regulamentadora NR15 instituída em 2002, estabelece o tempo de exposição diária permitida dará determinados níveis de ruídos para que não ocorram prejuízos à saúde do trabalhador (Yanagi Júnior et al, 2012).…”

Section: Introductionunclassified

Níveis de ruídos em diferentes postos de trabalho em uma colhedora de tomate industrial

Machado

Costa

Cunha

et al. 2020

BJD

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The use of agricultural machinery has limitations when analyzing the interaction man-machine related to ergonomics and safety of agricultural machines. Excessive exposure to certain levels of noise in a working day, in addition to the regulated values, cause problems hearing health of the operator. This study aimed to evaluate the noise levels emitted in different jobs in a tomato harvester, comparing them with the levels allowed by the rules in force in Brazil. The noise levels were monitored in the operating cabin and three points selection mat, places where are these workers during the harvesting operation. We evaluated the noise levels emitted only by the harvester engine and when the other mechanisms were in operation. The noise values were calculated from ten repetitions in both scenarios. The levels found were compared with the values regimented by current standards. From the results, it could be concluded in all the noise of jobs analyzed levels exceeded the limit of 85 dB(A) for 8 hours of daily exposure is essential to use proper hearing protection for this type of operation in all positions.

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“…Segundo NASCIMENTO et al (2007), a poluição sonora é, depois da poluição do ar e da água, a que afeta o maior número de pessoas. Diante disto, torna-se imperativo avaliar o ambiente acústico a que o trabalhador está submetido (BRAVALHERI et al, 2010;YANAGI JUNIOR et al, 2012). De acordo com SARAZ et al (2010), o que determina a qualidade ambiental dentro das instalações avícolas são os efeitos combinados das variáveis ambientais, como concentração de CO 2 e NH 3 , nível de ruído, temperatura do ar, umidade relativa e taxa de ventilação.…”

Section: Introductionunclassified

Condições ambientais em galpão convencional telado para galinhas poedeiras hyline W-36

Lourençoni¹,

Yanagi²,

Oliveira³

et al. 2015

Eng. Agríc.

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RESUMO:Devido às ocorrências dos vírus de influenza aviária (H5N1 e H7N2), estudos relacionados à biosseguridade têm-se intensificado, e uma das soluções discutidas é o uso de tela para cercar completamente o perímetro dos galpões, visando a evitar o contato das galinhas poedeiras alojadas com outras aves. Desta forma, o presente trabalho teve como objetivo avaliar e comparar a utilização de tela cercando o perímetro de galpões convencionais de poedeiras, sobre o ambiente acústico e aéreo no interior da instalação. A pesquisa foi realizada em uma granja comercial para produção de ovos, localizada no sul do Estado de Minas Gerais, e foi conduzida em um galpão aberto, que teve a metade de sua área cercada por tela e a outra metade mantida totalmente aberta. Foram alojadas galinhas poedeiras da linhagem Hyline W-36, sendo analisadas as variáveis de intensidade sonora, concentração de amônia (NH 3 ) e concentração de dióxido de carbono (CO 2 ). As variáveis foram coletadas em seis pontos de medição, em cada região (com e sem tela), dois em cada corredor (norte, central e sul). Os resultados indicaram que o uso de tela não alterou o nível de ruído e as concentrações de NH 3 e de CO 2 no interior do galpão analisado. Contudo, os níveis mensurados foram inferiores àqueles que ofereceriam riscos à saúde das aves e dos trabalhadores, podendo-se concluir que o uso de tela não influenciou negativamente no ambiente aéreo do galpão. PALAVRAS-CHAVE:biosseguridade, ruído, amônia, dióxido de carbono, poedeiras. ENVIRONMENTAL CONDITIONS IN A CONVENTIONAL SCREENED POULTRY SHEDABSTRACT: Avian influenza viruses (H5N1 and H7N2) triggered a great number of studies on biosafety, and one of the discussed solutions is the use of screen to enclose completely the poultry house perimeter, since it can avoid the contact of laying hens with other birds. Thus, the present study aimed to evaluate and compare the use of screen enclosing a conventional laying house perimeter by assessing acoustic and aerial environment inside the facility. The research was performed in a commercial egg production farm located in Southern Minas Gerais State, Brazil. It was carried out in an open facility, in which half area was enclosed by screen and the other half was maintained completely open. Hyline W-36 laying hens were housed. Sound intensity, ammonia concentration (NH 3 ) and carbon dioxide concentration (CO 2 ) were analyzed as variables. These variables were collected from six measuring points in each region (with and without screen), two in each alley (north, central and south). The results indicated that the use of screen did not alter the noise level, NH 3 and CO 2 concentrations inside the analyzed poultry house. However, the levels measured were smaller than to the thresholds that can offer health risks to birds and workers. Therefore, it may be concluded that the use of screen did not influence negatively the facility aerial environment.

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Spatial variability of noise level in agricultural machines

Cited by 15 publications

References 15 publications

Characterization of noise emitted by a power tiller through geostatistics

Characterization of noise emitted by a power tiller through geostatistics

Níveis de ruídos em diferentes postos de trabalho em uma colhedora de tomate industrial

Condições ambientais em galpão convencional telado para galinhas poedeiras hyline W-36

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