Sound Pressure
Mostrando 1-12 de 149 artigos, teses e dissertações.
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1. Simulation of Current Pulses and Sound Waves Resulting from Partial Discharges in a Needle-Plane Geometry in Air
Abstract Partial discharges can occur in different types of electric equipment and cause progressive insulation deterioration, so there is interest in monitoring partial discharges for assessing the state of the isolation of an electric system and to predict failures. Techniques to detect partial discharges, such as detecting ultrasonic emission, have been p
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. The Relationship between Contralateral Suppression of Transient Evoked Otoacoustic Emission and Unmasking of Speech Evoked Auditory Brainstem Response
Abstract Introduction Several studies have shown that efferent pathways of the auditory system improve perception of speech-in-noise. But, the majority of investigations assessing the role of efferent pathways on speech perception have used contralateral suppression of otoacoustic emissions as a measure of efferent activity. By studying the effect of effere
International Archives of Otorhinolaryngology. Publicado em: 2022
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3. The effectiveness of berberine on noise-induced hearing loss: a rat model
SUMMARY OBJECTIVE: Noise-induced hearing loss is a preventable form of hearing loss that has serious social and economic impacts. This study aimed to investigate the protective effect of berberine, a potent antioxidant and anti-inflammatory agent, against Noise-induced hearing loss. METHODS: After applying distortion product otoacoustic emission, 28 female
Revista da Associação Médica Brasileira. Publicado em: 2022
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4. Is the Level of Noise in a School Environment be Harmful to the Hearing of Teachers?
Abstract Introduction The excessive noise observed in the school environment can cause damages or losses to the learning process as well as risks to the health of teachers and students, such as physical, mental and social impairments, including, among them, hearing loss. Objective To assess otoacoustic emissions in teachers and determine whether classroom
Int. Arch. Otorhinolaryngol.. Publicado em: 2020-12
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5. USING SOUNDS PRODUCED BY PIGS TO IDENTIFY THERMONEUTRALITY ZONES FOR THERMAL ENVIRONMENT ASSESSMENT RATIOS
ABSTRACT Although dry bulb temperature (T) is the environmental variable most commonly used to classify thermal comfort in pigs, environmental assessment ratios provide more accurate information. The objective of this study was to correlate the sound pressure levels (SPL) produced by piglet vocalization with the thermal environment observed during the nurser
Eng. Agríc.. Publicado em: 2020-06
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6. Terapia breve intensiva com fonação em tubo de vidro imerso em água: estudo de casos masculinos
RESUMO Trata-se de um estudo de casos de três homens com 25, 39 e 40 anos de idade, avaliados antes e após dez sessões consecutivas de fonação em tubo de vidro imerso em água. O objetivo foi descrever os resultados vocais da terapia breve intensiva com fonação em tubo de vidro imerso em água, em três homens sem afecções laríngeas e com queixas v
Audiol., Commun. Res.. Publicado em: 26/09/2019
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7. Níveis de pressão sonora em salas de aula de uma Universidade e seus efeitos em alunos e professores
RESUMO Objetivo Mensurar os níveis de pressão sonora em salas de aula de uma Universidade, bem como verificar a autopercepção do ruído e sua influência nas atividades desempenhadas por alunos e professores universitários. Método Trata-se de um estudo realizado em dez salas de aula do Instituto de Ciências Biológicas e da Saúde da Pontifícia Uni
CoDAS. Publicado em: 02/09/2019
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8. Percepção de risco no uso do equipamento de proteção individual contra a perda auditiva induzida por ruído
Resumo Embora existam muitas abordagens sobre a exposição ocupacional ao ruído, a análise da percepção individual do trabalhador e suas implicações sobre o seu comportamento constituem ainda um tema raramente abordado. Objetivando colaborar em minimizar esta lacuna, fez-se um levantamento do estado da arte das publicações que relacionam às vari�
Gest. Prod.. Publicado em: 28/03/2019
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9. Equipartition of energy, Avogadro law and ratio of specific heats
Abstract The equipartition of energy in its simplest form, which is related to the translational motion of the molecules of a gas, was announced independently by Waterston in 1845 and by Clausius in 1857. In its more general form, it was formulated by Maxwell in 1860. Together with the relation between pressure and translational motion, given by the kinetic
Rev. Bras. Ensino Fís.. Publicado em: 18/02/2019
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10. Índice de inteligibilidade (SII) e variação da intensidade do sinal de fala em crianças com deficiência de audição
RESUMO Objetivo Comparar valores do índice de inteligibilidade de fala amplificado, para diferentes entradas de sinal de fala (75, 65 e 55 dBNPS), gerados no processo de verificação dos aparelhos de amplificação sonora, nos diferentes graus e configurações de perdas auditiva. Métodos Foram selecionadas 41 crianças com idades entre 3 e 80 meses,
Audiol., Commun. Res.. Publicado em: 31/01/2019
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11. Roll Bonding of Steel Net-Reinforced Aluminium Strips
The present study is dedicated to the experimental determination of strain parameters at rolling of aluminium matrix with inserted wire netting. Two types of stainless steel fabric netting with different orientation to the rolling axis were placed between two aluminium strips and hot rolled. The rolling temperature and reduction were varied to achieve the so
Mat. Res.. Publicado em: 01/02/2018
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12. Discharge of Non-Reactive Fluids from Vessels
Abstract This paper presents simulations of discharges from pressure vessels that consistently account for non-ideal fluid behavior in all the required thermodynamic properties and individually considers all the chemical components present. The underlying assumption is that phase equilibrium occurs instantaneously inside the vessel and, thus, the dynamics of
Braz. J. Chem. Eng.. Publicado em: 2017-10