Noise Reduction
Mostrando 1-12 de 126 artigos, teses e dissertações.
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1. Mathematical Analysis and Improvement of the Maximum Spatial Eigenfilter for Direction of Arrival Estimation
Abstract Maximum spatial eigenfiltering improves the accuracy of maximum likelihood direction-of-arrival estimators for closely-spaced signal sources but may interchangeably attenuate widely-spaced signal sources, producing a severe performance degradation. Although this behavior has been observed experimentally, it still lacks a mathematical explanation. In
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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2. Effect of Quiet and Noise on P300 Response in Individuals with Auditory Neuropathy Spectrum Disorder
Abstract Introduction Auditory neuropathy spectrum disorder (ANSD) is a clinical condition in which individuals have normal cochlear responses and abnormal neural responses. There is a lack of evidence in the literature regarding the neural discrimination skill in individuals with ANSD, especially when the signal is presented in the presence of noise. Obje
Int. Arch. Otorhinolaryngol.. Publicado em: 2020-12
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3. ELECTRICAL NOISES REDUCTION IN NANOPORES EXPERIMENTS BASED ON CONSENSUS FILTER
Nanopore has developed into an indispensable tool for single molecules experiments, where useful information about the characteristics of DNA/RNA can be obtained from the flowing of ionic current elicited by individual molecules as they traverse a single nanometer-scale aperture. However, due to the relatively high background current noise and low measuremen
Quím. Nova. Publicado em: 20/07/2020
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4. Fatores associados à percepção de ruído ocupacional intenso pelos professores da educação básica no Brasil
RESUMO: Objetivo: Estimar a prevalência e os fatores associados à percepção de ruído intenso nas escolas da educação básica no Brasil. Métodos: Estudo transversal com amostra nacional representativa dos professores. A coleta de dados foi realizada com 6.510 professores, de outubro de 2015 a março de 2016. Todos os professores responderam a um q
Rev. bras. epidemiol.. Publicado em: 05/12/2019
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5. INNOVATION SYSTEM IN AIR TRANSPORT MANAGEMENT
Abstract Identifying previous research subjects on innovation management in air transport provides not only updated references on new technologies in this industry, but also indicates which areas need to be prioritized in future research. A systematic literature review of publications in this field over the past decade, from 2005 to 2015, including 2016 publ
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 02/12/2019
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6. The Effect of Digital Noise Reduction on Annoyance and Speech Perception in Low and High Acceptable Noise Level Groups
Abstract Introduction Studies have reported that although speech perception in noise was unaltered with and without digital noise reduction (DNR), the annoyance toward noise measured by acceptable noise level (ANL) was significantly improved by DNR with the range between 2.5 and 4.5 dB. It is unclear whether a similar improvement would be observed in those
Int. Arch. Otorhinolaryngol.. Publicado em: 25/11/2019
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7. Evaluation of Global Heating Reduction Potential with the Replacement of Electricity Supplied by the Local Concessionaire Via Solar Renewable Source.
Abstract The objective of this paper is to evaluate, through the 100-year Life Cycle Analysis, Global Warming Potential (GWP) and Global Temperature Increasing Potential (GTP) impact categories. It is proposed scenario of replacement of the energy matrix for the supply of electricity by Solar Photovoltaic, adopting as consumption base the facilities of Supe
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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8. The efficacy and safety of multiple sessions of multisite transcranial random noise stimulation in treating chronic tinnitus
Resumo Introdução: Tem sido relatado que a estimulação transcraniana por ruído aleatório é um tipo mais eficaz e seguro de técnica de estimulação elétrica no alívio dos sintomas do zumbido. O protocolo multissítio da estimulação transcraniana por ruído aleatório mostrou efeitos favoráveis adicionais. Objetivo: Discutir o papel da aplicaç
Braz. j. otorhinolaryngol.. Publicado em: 07/11/2019
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9. Potential years of life lost due to oropharyngeal cancer in Brazil: 1979 to 2013
RESUMO OBJETIVO Estimar os anos de vida perdidos pela população brasileira devido ao câncer de boca e faringe de 1979 a 2013 e analisar a tendências temporais no período estudado, segundo região do país, sexo e sítio anatômico. MÉTODOS Os registros de óbitos foram obtidos do Sistema de Informações sobre Mortalidade e os dados referentes à pop
Rev. Saúde Pública. Publicado em: 02/09/2019
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10. Effect of Boundary Layer and Rotor Speed on Broadband Noise from Wind Turbines
ABSTRACT: Trailing edge surface of aerofoil is an important source of broadband aerodynamic noise production. In this paper, three aerofoil self-noise mechanisms from turbulent boundary layer near trailing edge surface are studied. Numerical computations were performed for a three bladed 2 MW horizontal axis upwind turbine of blade length 37 m and source hei
J. Aerosp. Technol. Manag.. Publicado em: 03/06/2019
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11. Classification of Flying Insects with high performance using improved DTW algorithm based on hidden Markov model
ABSTRACT Insects play significant role in the human life. And insects pollinate major food crops consumed in the world. Insect pests consume and destroy major crops in the world. Hence to have control over the disease and pests, researches are going on in the area of entomology using chemical, biological and mechanical approaches. The data relevant to the fl
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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12. Use of Magnetic Barkhausen Noise (MBN) to Follow Up the Formation of Sigma Phase in Saf2205 (UNS S31803) Duplex Stainless Steel
Abstract Duplex stainless steels have a structure normally composed of austenite and ferrite in approximately equal proportions. In order to attain control of its fabrication processes and performance, it is important to understand its microstructural evolution, due to the formation of intermetallic phases such as sigma (σ) and chi (χ), which may cause a s
Mat. Res.. Publicado em: 01/08/2016