Consulta: subjectFacets:"Sound pressure"
Registros recuperados: 2
Data/hora: 26/07/2024 22:41:37

Air quality in swine growing and finishing facilities with different building typologies
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Cecchin,Daiane; Campos,Alessandro T.; Cruz,Vasco F. da; Sousa,Francine A.; Amaral,Pedro I. S.; Yanagi Junior,Tadayuki.
ABSTRACT The objective of this study was to evaluate the concentration of gases in three swine growing and finishing facilities with different building typologies, regarding floor and dividers. The experiment compared three treatments: pen with water depth, pen with partially slotted floor on the sides, and pen with partially slotted floor on sides and in the center. Measurements of instantaneous concentrations of ammonia (NH3 ppm) and carbon dioxide (CO2 ppm) were taken at animal level. The levels of sound pressure (dB) at animal level and at 1.50 m from the floor were also recorded. It was observed that the pen with water depth was the one with the highest average concentration of NH3. Although there was a significant difference in CO2 concentrations,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Rural buildings; Gas concentration; Sound pressure.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500339

Welfare and spatial distribution of noise levels in swine nursery
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Damasceno,Flavio A.; Oliveira,Carlos E. A.; Ferraz,Gabriel A. e S.; Nascimento,João A. C. do; Saraz,Jairo A. O.; Brandão,Leidimar F.
ABSTRACT The aim of this study was to evaluate the welfare and spatial distribution of noise levels in a swine nursery during the first three weeks of animal’s life. The climatic conditions were evaluated through the dry-bulb temperature (Tdb), relative humidity (RH) and black globe temperature and humidity index (BGHI) and allowed us to observe that the heating system influenced the conditions in the environment, and the use of the air conditioning system did not guarantee animal’s comfort conditions. The analysis on the spatial distribution of noise levels was performed using geostatistics and demonstrated the occurrence of spatial variability inside the facilities. The highest frequencies of noise levels were concentrated between 60 and 70 dB, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pig farming; Thermal comfort; Sound pressure; Spatial variability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300196