Acoustical Materials
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Acoustical and thermal performance of multilayer closing panels used in steel-structured buildings
Abstract This article provides an evaluation of the acoustical and thermal performance of some closing systems by referencing materials such as cement plates, plasterboard walls, precast concrete panels and expanded polystyrene. Reverberation time is calculated by applying an empirical formula, which uses temperature and relative air humidity values obtained
REM, Int. Eng. J.. Publicado em: 2017-06
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2. 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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3. Acoustical vibration characterics of prefabricated panels employed in industrialized construction
With the development of industrialized steel construction, new constructive elements have been brought not only to the market, but to the everyday construction site as well and, in this way professionals and users have questioned their efficiency. In respect to vibrations in floors, what can be detected is that floor structures are thinner and a decrease of
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-06
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4. Leak detection in pipelines through acoustic method and pressure transient analysis / Detecção de vazamentos em tubulações atraves de metodo acustico e da analise de transientes de pressão
Redes de tubulação são sistemas complexos de dutos utilizados no transporte de fluidos a longas distâncias. Um pequeno vazamento em uma tubulação pode provocar grandes perdas de produtos e sérios danos ao meio ambiente até serem detectados. Com o propósito de prevenir vazamentos em tubulações, várias técnicas são relatadas na literatura. Este t
Publicado em: 2007