Encontrados 2 documentos, a visualizar página 1 de 1
Will high speed trains change Portuguese railway noise?
António P. O. Carvalho; Pedro D. S. OliveiraThis paper presents the in situ evaluation of noise from railway traffic on a modernized section of the Portuguese railway network. The measurements include noise spectra for four types of Portuguese rolling stock in terms of their maximum Transit Exposure Level (TEL), equivalent Sound Pressure Level and frequency content. The obtained data allows for a noise characterization of the various types of Portuguese ...
Divisórias autoportantes de desempenho acústico optimizado
António P. O. Carvalho; Pedro D. S. OliveiraThis paper presents the designing of self sustaining modular elements, built on wood derivates, for acoustic absorption that function as grouped resonators and/or membranes, to be placed on open space environments such as offices or call centers. They constitute a versatile solution as they are optimized for large spectrum sound absorption. An experimental study is presented where some parameters such as the pe...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||