In the modern urban lifestyle, more and more people are exposed to noise pollution in form of traffic noise. As a response to this, the automotive OEMs (Original Equipment Manufacturer) are put under pressure to reduce the emitted noise from vehicles. To be able to meet the upcoming, stricter regulations, the automotive OEMs seeks new techniques to be able to front load the pass-by noise engineering in the vehicle development process and to identify and understand the different sources that contributes to the exterior noise.Earlier exterior sources ranking using ASQ (Airborn Source Quantification) with an energetic approach during pass-by noise test has yielded very good and reliable results for an ICE (Internal Combustion Engine) vehicle.In this Master Thesis, two exterior source ranking methods have been tested and evaluated for an electric vehicle during in-room pass-by noise test. The two methods were: ASQ and OPA (Operational Path Analysis). In total, five models were built from the two methods and each model was evaluated for, in total, three driving conditions corresponding to the current ISO362-1:2007 and the proposed, revised version.The results show that the ASQ models are not capable to correctly estimate the engine contribution due to its high tonality. Moreover, it was seen that the energetic ASQ model is very sensitive to small changes. Both ASQ models underestimated the tire noise.The OPA model on the other hand managed to estimate the total contribution very well. Both the engine contribution and the tire contributions are well estimated. Nevertheless, OPA as method has several weaknesses and building an OPA model is not a straightforward task. Its weaknesses and the process to reach a final OPA model are discussed in this thesis.It was seen that one of the most crucial steps in an OPA model is to have clean references to get meaningful results. A MIMO-FIR filter was therefore used to filter out engine harmonics from the tire references. Its principles and importance for the end results are also discussed.Included is also an overview of the basic principles in TPA (Transfer Path Analysis), ASQ, OPA and in room pass by noise test as well as a description of the test campaign.

Submitted by Cleide Dantas (cleidedantas@ufpa.br) on 2014-03-20T13:29:12Z No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_AvaliacaoDesenvolvimentoCriancas.pdf: 2351293 bytes, checksum: d9df52d15ad3bc2ea9d90dce548a26e1 (MD5) / Approved for entry into archive by Ana Rosa Silva (arosa@ufpa.br) on 2014-06-24T16:01:04Z (GMT) No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_AvaliacaoDesenvolvimentoCriancas.pdf: 2351293 bytes, checksum: d9df52d15ad3bc2ea9d90dce548a26e1 (MD5) / Made available in DSpace on 2014-06-24T16:01:04Z (GMT). No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_AvaliacaoDesenvolvimentoCriancas.pdf: 2351293 bytes, checksum: d9df52d15ad3bc2ea9d90dce548a26e1 (MD5) Previous issue date: 2012 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / O presente estudo aborda o desenvolvimento de crianças em instituição de acolhimento infantil (abrigo) a partir da utilização de escalas avaliativas. Destaca-se compreender o desenvolvimento, sob o enfoque de aspectos relacionados à comunicação, coordenação motora fina e grossa, resolução de problemas e comportamento pessoal-social. Participaram da pesquisa seis crianças com idades compreendidas entre 4 e 9 meses e as educadoras de referência dos dormitórios das crianças envolvidas no estudo. Para tanto, utilizou-se dados coletados da avaliação de crianças a partir da aplicação das escalas Ages and Stages Questionnaires third edition (ASQ- 3) e Bayley Scales of Infant Development second edition. As crianças selecionadas para o estudo também foram observadas através de um Roteiro de Observação Sistematizada, estruturado previamente com inspiração em três escalas de desenvolvimento para crianças de 1 a 12 meses. Dados referentes à história pregressa de todas as crianças envolvidas no estudo, também foram considerados e obtidos por meio de relatos informais da equipe da instituição de acolhimento e através de documentos (prontuários) junto à direção. A avaliação demonstrou que cinco das seis crianças avaliadas pela ASQ-3, tiveram seus resultados ratificados pelas escala Bayley II e destas, quatro estão em risco para o desenvolvimento e necessitariam de avaliação mais aprofundada nas áreas de coordenação motora ampla e resolução de problema. O estudo realizado, além de contribuir para a compreensão do desenvolvimento das crianças nessas instituições, principalmente, no sentido de prevenir os danos oriundos da ausência de atenção precoce, demonstra, ainda, que as educadoras presentes nesses locais podem ser capazes de avaliar alterações que possam surgir no curso do desenvolvimento das crianças sob sua responsabilidade, pois os resultados do instrumento de triagem utilizado pelas educadoras foram ratificados pela avaliação realizada por um profissional a partir da escala Bayley. Propõe-se que estudos futuros possam reconhecer a importância das educadoras neste processo. / This study discusses the development of children in child care institution (shelter) through the use of evaluative scales. It is noteworthy to understand the child development, with a focus on aspects related to communication, fine and gross motor skills, problem solving and personalsocial behavior. The participants of the study were six children aged in the ranges of 4, 6, 7,8 and 9 months. For this, we used data collected from the assessment of children from two different scales: Ages and Stages Questionnaires third edition (ASQ-3) and Bayley Scales of Infant Development second edition. The children selected for the study were also observed through a Systematic Observation Guide, previously inspired structured into three scales of development for children aged 1 to 12 months. Data relating to the history of all the children involved in the study were also considered and obtained through informal reports of staff of the host institution and through documents (records) along the way. The evaluation showed that five of the six children assessed by the ASQ-3, their results were ratified by the Bayley II scale and of these, four are at risk for development and would require further evaluation, particularly in the areas of motor coordination and resolution of broad problem. The results of this study and contribute to understanding the development of children in these institutions, mainly in order to prevent damage from the lack of early attention, demonstrate further that the educators present at these sites may be able to predict changes in course of development of the children under their responsibility. Finally, it is proposed that future studies can recognize the importance of educators in this process.