Acoustic Isolation
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Influence of the type of fastening of multi-layered closing panels on the estimate of the sound transmission loss
Abstract Industrialized closing systems appear as rational solutions in steel-structured construction. These closing systems, consisting of multi-layered panels, have been applied in projects where it is intended to obtain a high sound transmission loss without raising the cost and without using a lot of mass. However, acoustic isolation depends on several f
REM, Int. Eng. J.. Publicado em: 2016-12
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2. Advertisement call of Dendropsophus microps (Anura: Hylidae) from two populations from southeastern Brazil
In anurans, acoustic communication is a major mechanism of pre-zygotic isolation, since it carries information about species recognition. Detailed descriptions of the acoustic properties of anuran advertisement calls provide important data to taxonomist and to the understanding of the evolution of the group. Herein we re-describe the advertisement call of th
Zoologia (Curitiba). Publicado em: 2015-06
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3. Controle acústico híbrido da perda de transmissão sonora / Hybrid acustic control of sound transmission loss
The control of transmission loss through panels is a problem that has attracted the attention of automotive, aeronautical and aerospace industries. The passive noise control strategies used for this purposed does not have high efficiency in all audible spectrum, although it consists in a robust solution, it is not effective in low frequency absorb (below 1kH
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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4. Estudo do ruído de rodagem estrutural através da análise dos caminhos de transferência de energia - TPA / Structure-borne road noise study using transfer path analysis, TPA
The road noise, vibration and harshness (Road NVH) present from 20 Hz to 1000 Hz approximately, begins from the tires vibration and acoustic propagation and their interactions with the road surfaces. In these noise sources, both structural-borne and air-borne noise contributions are relevant to vehicle refinement. The constant efforts to study the vehicle as
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2011
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5. Padrões de emissão acústica em moscas-das-frutas do gênero Anastrepha (Diptera: Tephritidae) e suas implicações no isolamento reprodutivo pré-copulatório / Acoustic emission patterns in fruit flies of genus Anastrepha (Diptera: Tephritidae) and precopulatory reproductive isolation
Três tipos de sons de cortejo foram descritos para machos de tefritídeos: de chamada, na ausência de fêmeas; de aproximação, na proximidade de fêmeas; e de pré-cópula, após a monta das fêmeas pelos machos. Nas espécies do gênero Anastrepha em que foram registrados sons de acasalamento, somente dois tipos estão presentes: de chamada e de précó
Publicado em: 2011
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6. Materiais e técnicas contemporâneas para controle de ruído aéreo em edifícios de escritórios: subsídios para especificações / Contemporaneous materials and techniques to air noise control on corporate edifices: specification foundations
Big cities have been taken the ground thought freeways and avenues, where constant and loud noise takes place. At theses ways, corporate edifices are also often established, so they naturally become exposed to the external noise interference, regardless the own internal facilities noising. The consequence is that people how work at these places are more pron
Publicado em: 2009
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7. ANÁLISE DA ISOLAÇÃO ACÚSTICA EM PAREDE DE HABITAÇÃO POPULAR EXECUTADA COM RESÍDUOS DE PNEUS / ANALYSIS OF ACOUSTIC ISOLATION IN WALL OF POPULAR HABITACION EXECUTED WITH RESIDUES OF TIRES
Neste presente trabalho avalia-se o isolamento acústico de uma parede executada com placas pré-moldadas, construídas com material reciclável (borracha de pneus), empregada em edificações populares, há quase duas décadas, na cidade de Santa Cruz do Sul - RS. O sistema construtivo é executado em parte com a utilização de mão de obra carcerária, cu
Publicado em: 2009
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8. COMPARATIVE STUDY WITH SEVERAL FLOATING NATURAL WOOD FLOOR COMPOSITION REGARDING NOISE IMPACT ISOLATION / ESTUDO COMPARATIVO ENTRE DIVERSAS COMPOSIÇÕES COM PISOS FLUTUANTES DE MADEIRA NATURAL ASSOALHO E TACOS QUANTO AO ISOLAMENTO DO RUÍDO DE IMPACTO
Esta pesquisa faz uma análise e comparação de diferentes sistemas de pisos flutuantes de madeira natural submetidos a ruído de impacto, em diferentes composições utilizadas na indústria da construção civil. Os ensaios foram realizados nas câmaras para medir ruído de impacto do Laboratório de Termoacústica da UFSM, conforme metodologias especific
Publicado em: 2009
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9. Fungos e micoses em animais silvestres recebidos por Centros de Triagem / Fungi and mycosis in wild animals received by Screening Centers
The study of the infectious diseases in wild animals, in special the illnesses caused by fungi, have a few stories related with the incidence and distribution of the diverse ethiologic agents in captive populations and especially in the free ranging animals. The identification of the fungical species that are part of microbiota in healthful animals is primor
Publicado em: 2009
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10. Metodologia para desenvolvimento de projeto de fachacas leves. / Methodology to develop lightweight facade design.
The facades are considered one of the most relevant building subsystems, contributing both to building valuation and its performance, and has a great importance concerning the sustainability. In addition, its execution and maintenance costs are expressive when compared to others subsystems. Because of its economical and technical importance, the façade tech
Publicado em: 2009
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11. Caracterização acustica de ginasios de esportes multifuncionais da cidade de Campinas, SP / Characterization acoustics multipurpose gymnasium of sports of the Campinas s city
Similar sonorous stimulus may promote different sound perceptions in the environment. Sonorous stimulus may be objectively evaluated by acoustic measurements however, sound perceptions evaluation (subjectively) requires another specific methods. Spaces like sport gymnasiums can promote different sensations for the users depending on their activities. This ty
Publicado em: 2008
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12. ESTUDO DE ALVENARIAS E REVESTIMENTOS DE GESSO RECICLADO DESTINADO À HABITAÇÃO POPULAR / Study of masonry and Coatings made by Recycled plaster for low cost housing.
The generation of large quantities of solid waste is a great problem faced by urban areas. Like all building materials, the gypsum plaster is a generator of solid waste. The amount and inadequate waste disposal cause serious environmental, social and economical impacts. This requires the search for quick and effective solutions for its management, through th
Publicado em: 2008