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handle: 10261/8540
[ES] Se estudian las características y condicionantes principales de la mejora del aislamiento acústica de trasdosados ligeros tanto en sus aspectos espectrales como de valoraciones globales. Se analiza la adecuación al cálculo predictivo de varios modelos de propagación comparativamente con valores reales enfatizando los factores de mayor contribución a la mejora del aislamiento. Se propone una modificación de las ecuaciones del modelo de Sharp para el caso de uniones de compliancia nula. Se resalta la importancia de la curva de referencia el en valor global de la mejora de aislamiento de estos elementos y su potencial influencia en el diseño y se indica la existencia de formas espectrales óptimas de la mejora de aislamiento del trasdosado en funcion de la curva de referencia y de espectro del ruido incidente.
[EN] Main factors determining the sound insulation improvement of lightweight linings are analysed under the basis of up-dated theoretical models of sound insulation of double leaf walls. The influence of these factors on numerical curves ΔR(f), is compared to experimental results of actual lightweight linings concluding on the convenience of further investigations. Some changes on Sharp’s model for zero compliance fixations are proposed. The influence of reference curve in computing global quantities (f.e. ΔRA) is analysed, as well as its influence in design projects emphasizing the existence of smart spectra ΔR(f) to obtain a given value ΔRA, as a function of the reference curve and the incident noise spectrum.
7 pages, 4 figures.-- PACS nr.: 43.55.Ev.-- Comunicación presentada en: XXXVI Jornadas Nacionales de Acústica – TecniAcústica 2005, Encuentro Ibérico de Acústica y EAA Symposium "Southern Europe Workshop on Environmental Acoustics and IMAGINE project" (Terrassa, 19-21 Oct 2005).
Este trabajo se ha desarrollado dentro del Programa Nacional de Investigación PN 2004, Proyecto: BIA 2004-07 102-CO3-01.
Publicado en número especial de la Revista de Acústica: Vol 36, 3-4 (2005).
Peer reviewed
Lightweight linings, Sound insulation, Double leaf walls, Edificios, Modelo de Sharp, Trasdosados ligeros, Aislamiento acústico, Buildings, Divisorios dobles, Sharp's model, Reference curves, Curvas de referencia
Lightweight linings, Sound insulation, Double leaf walls, Edificios, Modelo de Sharp, Trasdosados ligeros, Aislamiento acústico, Buildings, Divisorios dobles, Sharp's model, Reference curves, Curvas de referencia
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