Show simple item record

dc.contributorJacobsen, Finn
dc.contributor.authorTiana Roig, Elisabet
dc.date.accessioned2010-01-18T09:01:58Z
dc.date.available2010-01-18T09:01:58Z
dc.date.issued2009-10-08
dc.identifier.urihttp://hdl.handle.net/2099.1/8360
dc.descriptionProjecte final de carrera realitzat en col.laboració amb la Technical University of Denmark i Brüel & Kjaer
dc.description.abstractA problem of practical interest when dealing with outdoor acoustic measurements is to estimate the noise contributions from di erent directions around the measurement point. This estimation can be done by means of microphone arrays. More speci - cally, circular arrays are suitable for this purpose as, in combination with proper signal processing techniques, they are capable of mapping the sound eld in a plane over 360 . Two processing techniques meant to be used with circular arrays are implemented: the `classical' Delay-and-Sum beamforming and a novel technique called Circular Harmonics beamforming. The latter is based on the decomposition of the sound eld in series of circular harmonics. The performance of these beamforming techniques is analyzed by means of simulations and evaluated by two parameters, the resolution and the maximum side lobe level. Making use of the results of the simulations, a circular array has been designed for the localization of environmental noise sources around a measurement point. Finally, a prototype implemented in accordance with the design has been tested in anechoic conditions. The results, which agree very well with the simulations, reveal that the array is suitable for the purpose of concern.
dc.language.isoeng
dc.publisherUniversitat Politècnica de Catalunya
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la parla i del senyal acústic
dc.subject.lcshNoise -- Environmental aspects
dc.titleBeamforming Techniques for Environmental Noise
dc.typeMaster thesis (pre-Bologna period)
dc.subject.lemacSoroll -- Aspectes ambientals
dc.rights.accessOpen Access
dc.audience.educationlevelEstudis de primer/segon cicle
dc.audience.mediatorEscola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona
dc.audience.degreeENGINYERIA DE TELECOMUNICACIÓ (Pla 1992)


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record