1,721,104 research outputs found
Il futuro del mercato interno dell'energia elettrica: la Direttiva 96/92/CE dal 19 dicembre 1996
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Aggiornamento delle norme tecniche per la progettazione esecuzione ed esercizio delle linee elettriche aeree esterne
No full textLa mappatura acustica strategica in Italia tra criticità e soluzioni
No full textCon l’emanazione del D. Lgls. 194 del 2005, con il quale viene recepita la direttiva europea 2002/49/CE, si è dato avvio anche in Italia alla mappatura acustica strategica degli ag-glomerati (13 identificati sopra i 250.000 abitanti), delle principali infrastrutture di tra-sporto (strade e ferrovie con più di 6 milioni di veicoli e 60.000 convogli annui), e dei grandi aeroporti (Roma Fiumicino, Milano Malpensa, Milano Linate, Venezia, Bologna, Roma Ciampino, Catania, Napoli, Bergamo). In questi sei anni poco ancora è stato fatto per adempiere agli obblighi della direttiva, poche le mappe ultimate entro i termini (il 30-6-2007 per la prima fase), ancor meno i corrispondenti piani di azione (entro il Luglio 2008). Inoltre, entro giugno 2012 dovrebbe essere concluso anche il secondo step di mappature relativo alle infrastrutture e agglomerati di media grandezza (agglomerati con oltre 100.000 abitanti e strade e ferrovie, con più di 3 milioni di veicoli e 30.000 convogli annui). Al di là di una mera denuncia delle carenze e delle possibili infrazioni comunitarie, è evidente che ad oggi sono scarse le esperienze di mappatura in Italia e in particolare quelle relative agli agglomerati. Considerate le prossime scadenze si è ritenuto importante fare il punto in questo lavoro sulle procedure seguite, le criticità maggiormente riscontrate e ciò di buono che è stato fatto, per stimolare soluzioni efficaci e procedure comuni
Performance degradation of porous asphalt pavements
No full textThe degradation of the acoustical properties of porous asphalt pavements is
universally recognised. However the real evolution of these properties is difficult to evaluate as many factors can influence the measurement results making the analysis not so reliable. In this paper, attempts have been made in order to describe the degradation with traffic of both physical parameters and acoustical properties of porous asphalt pavements within a climatic region in the center of Italy. For this purpose two experimental pavement sections have been
built in Tuscany and they have been monitored for three years in a joint research project. They are a single layer and a double layer porous asphalt pavements. The experimental measurements have been carried out every six months by performing tests both in situ and in
the laboratory on pavement specimens. Analysis of the data has allowed degradation
evaluation of both acoustical and physical parameters of the two pavement sections allowing interesting considerations to be made
Guidelines for noise monitoring systems in port area
No full textIn terms of greenhouse gas emissions, maritime transportation offers a significant advantage compared to the other transport infrastructure, especially for long range distances. However, the estimation of its noise emission has been poor, with a consequent underestimation of the impact on citizens. The causes are probably the lower level of know-how on port noise compared to other noise sources and the high level of complexity that port areas have in terms of the number of different noise sources and interaction with the other main transportation infrastructures. Therefore, ports represent a serious challenge in a noise management standpoint. An effective noise monitoring is helpful to identify noise limits exceedings of the port areas and to plan mitigation measures if needed. Having a port noise monitoring system is also useful for improving the citizen involvement and awareness. Under the hood of the INTERREG Marittimo-Maritime Program, the present work draws up the specifications for integrated noise monitoring networks to be installed in the ports involved in the projects
ACOUSTIC COMFORT IN YACHTS: MEASUREMENTS WITH ACOUSTIC CAMERA
No full textShipowners have become more sensitive to noise issues, leading to consider acoustic comfort as an important parameter in the design of private boats. In the last years, manufacturers have been requested more attention to the living environments of leisure ships. Especially for luxury vessels, it has been seen that only the respect of the acoustic limits for the health safety of the crew, does not imply a good quality of life on board. Some naval country agencies have developed criteria based on the acoustic indexes used for the buildings, having in mind the different scopes of the various environments. Unfortunately, a common international line has still not been defined. The present work reports the analysis of data acquired with an acoustic camera in the process of the acoustic comfort evaluation of a 50 m long yacht. Due to the cabins' dimensions, the measurements were performed with an antenna of 0.28 m radius. This allowed the localization of noise with a Beamforming technique in the frequency range higher than 1 kHz. Its main use has been to localize different “sound leakage” routes that could compromise noise insulation mitigation
Port noise and complaints in the North Tyrrhenian sea and framework for remediation
Full text linkCompared to the other relevant noise sources such as railways, roads, and airplanes, the regulation regarding port noise is lagging behind. The absence of specific laws is likely one of the main causes of the increasingly high number of complaints reported by the citizens living nearby the ports. At the same time, scientific literature concerning the impact of port noise and its mitigation is not so widespread and only a few studies are available at the moment. However, the volume of maritime traffic has increased in the last years and consequently, Port Authorities are required to assess the impact of port operations on the city soundscape without using specific directives or guidelines. In this context, the INTERREG Maritime programme projects RUMBLE, MON ACUMEN, and REPORT aim to fill this gap, by investigating the state-of-the-art of port noise in the north Tyrrhenian sea and developing helpful instruments. Data were collected via a survey sent to the Port Authorities, local environmental protection agencies and universities involved in the projects. The survey was focused on monitoring systems, previous measurement campaigns, noise maps, and citizens’ complaints already taken. The results confirmed both a lack of awareness among residents and authorities and the absence of actions aimed at reducing port noise. In this framework, the difficulties encountered by the Port Authorities in managing the ports sustainably are highlighted. An underestimation of citizens’ exposure to noise in port areas could be expected
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