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Utilização de filtros adaptativos em sistemas de redução ativa de ruído para ambientes amplos
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Elétrica e Informática IndustrialUTFPR, 2019-09-27)
Industrial noise is a worrysome occupational health and safety subject-matter for employees. Prolonged exposure to noise may generate hearing loss or even heart or psychological problems. This study aims to evaluate the ...
Effect of natural and synthetic noise on evoked vocal responses in a frog of the temperate austral forest
(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2005-09)
Animals using sound communication have developed different strategies to overcome noise interference, but studies have rarely examined animals behaving in their natural environments. Males of the leptodactylid frog Eupsophus ...
Análise comparativa de diferentes tempos de dosimetria de ruído para avaliação de uma jornada de trabalho
(Universidade Tecnológica Federal do ParanáCuritibaBrasilEspecialização em Engenharia de Segurança do TrabalhoUTFPR, 2018-05-16)
This study is motivated by the need to control risks in the workplace. As new industrial processes arise, there is an increase in the number of workers exposed to risk agents. Particularly to noise, as it is the most common ...
Spatial dependence of noise in different agricultural tractors engine revolutions
(Univ Estadual Mato Grosso Sul, 2015-07-01)
Several elements affect workers' health, and the noise was a major factor causing stress and harmful to operators, which are exposed for many hours to loud noises. The objective was to quantify and measure the amplitude ...
Estudo de ruído em transformadores a seco encapsulados
(Universidade Tecnológica Federal do ParanáCornelio ProcopioBrasilEngenharia ElétricaUTFPR, 2017-06-08)
This work aims to study the main sources of noise in Dry Type Transformer, the processes required for carrying out the tests in the manufacturer's laboratory as set by the NBR 7277/2013. Develop an algorithm for simulation ...
A influência do uso deliberado do ar comprimido sobre o conforto acústico no ambiente de trabalho
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Construção Civil, 2014-11-17)
Compressed air is widely used in the industry. Among various applications can highlight the process with production of plastic parts which is the subject of this study. Whereas it is used in the daily affairs of workers ...
Comparison of mathematical methods and measurements of traffic noise indices in pedestrian routes
(ANTAC - Associação Nacional de Tecnologia do Ambiente Construído, 2019)
The effect of noise on the voice of preschool institution educators
(REVISTA DE SAUDE PUBLICASAO PAULO, 2012)
OBJECTIVE: To analyze the association between noise levels present in preschool institutions and vocal disorders among educators. METHODS: Cross-sectional study conducted in 2009 with 28 teachers from three preschool ...
Effectiveness of a visual noise warning system on noise levels in a surgical ICU: A quality improvement programme
(Lippincott Williams and Wilkins, 2019)
BACKGROUNDThe effects of noise are harmful to patients in the ICU environment, and the latter are particularly noisy places. High noise levels seem to be a factor in sleep disturbance, which can, in turn, result in increased ...
OFDM tolerance to additive white Gaussian and laser phase noises in optical heterodyning systems accompanied by the feasible pilot-assisted equalization
(Optical Society of Japan, 2020)
It is well known that the performance of orthogonal frequency division multiplexing (OFDM) is limited by phase noise, which depends on the laser linewidths for coherent-detection radio over fiber (RoF) systems. In this ...