Browsing by Author "Díez, Itxasne"
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Item Methodology to evaluate the efficiency of additional devices on noise barriers(2009) Díez, Itxasne; Fernández, Pilar; Vázquez, Manuel; Tecnalia Research & Innovation; CALIDAD Y CONFORT AMBIENTALDue to the interest in reducing the noise quality in the vicinity of roads, it is very common to find anti-noise devices on their banks. The continuous growth of roads and vehicles have required the need to improve the effectiveness of barriers, putting on the barrier additional element called top device (cap, top barrier, crowning). This paper presents the first results obtained during the MAITE project "Transport infrastructure noise attenuation: design and system modelling of additional devices to optimize the effectiveness on diffraction edges", based on calculations to evaluate the effect of the top edge of the barrier. The Harmonoise reference model has been used to choose the propagation method for evaluating the diffraction effect either in the source region and receiver region. The intrinsic characteristics of sound diffraction of added devices have been assessed according to the European technical specification CENT/TS 1793-4. Finally, it is also presented the results obtained by numerical simulations using a Boundary element method, in order to verify the results achieved in the measurement campaign.Item Progress in the understanding of soundscape: Objective variables and objectifiable criteria that predict acoustic comfort in urban places(2016-01) Herranz-Pascual, Karmele; García, Igone; Aspuru, Itziar; Díez, Itxasne; Santander, Álvaro; CALIDAD Y CONFORT AMBIENTAL; ADAPTACIÓN AL CAMBIO CLIMÁTICO; Tecnalia Research & InnovationThe overall aim of this research was to find a group of easy-to-access variables, that are measurable or assessable, and which help predict acoustic comfort in urban places, in order to make further progress in developing a soundscape indicator based on indices readily available in urban environments. Our main conceptual framework has been the Environmental Experience Model and the ISO of Soundscape, together with the most up-to-date information and technology, where parameters that influence the soundscape and comfort in urban public places have been identified. This work has been undertaken as part of the CITI-SENSE project. A viable technical and procedural solution was designed and tested in a field demonstration, where 53 people were engaged to provide 120 observationsinthe city of Vitoria-Gasteiz, using environmental sensors connected to a smartphone. The results were analysed and are discussed here with the aim of defining an indicator that permits an easy evaluation of acoustic comfort in urban places. The results presented in this article are considered a step forward in the development of a soundscape indicator based on indices readily available in urban environments. The limitations of the findings are also discussed, as are suggestions for further research.