A legislação sobre o ruído de aeronaves no Brasil reconhece a métrica DNL como a única ferramenta para implementar zoneamento de ruído em aeroportos. Este artigo analisa a importância da adoção de uma métrica auxiliar para caracterizar os impactos do ruído das aeronaves em construções específicas sensíveis ao ruído, especialmente na análise de interferência na fala e nos distúrbios do sono. Foi utilizado neste trabalho uma métrica complementar, LAeq, associada a norma brasileira de controle da poluição sonora, NBR 10151 (Avaliação do ruído em áreas habitadas para o conforto da Comunidade). Uma curva de controle baseada no LAeq e na norma foi criada e a área tampão entre a curva de controle e o DNL 65dB(A) foi o objeto de estudo deste trabalho. Os resultados mostraram um número elevado de pessoas que são atingidas pelo ruído aeronáutico e são desprezadas pelas autoridades públicas, só no aeroporto de Congonhas este número atinge a marca de 596.808 pessoas. A adoção da métrica complementar tem o intuito de auxiliar os tomadores de decisão na identificação das pessoas altamente incomodadas pelo ruído aeronáutico, permitindo a criação de medidas de mitigação nas áreas afetadas.

The legislation on aircraft noise in Brazil recognizes the DNL metric as the only tool to perform noise airport zoning. This paper examines the importance of adopting an auxiliary metric to characterize the impacts of aircraft noise at a specific building sensitive to noise, especially in analysis of speech interference and sleep disturbance. A complementary measure, LAeq, associated with the Brazilian standard for controlling noise pollution, NBR 10151 (Assessment of noise in inhabited areas, for Community comfort), was used in this work. A control curve based the LAeq and on the standart was created and the buffer area between the control curve and DNL 65dB (A) was the object of study of this work. The results showed a high number of people who are affected by aircraft noise and are despised by the public authorities, only at Congonhas airport this number reaches the mark of 596,808 people. The adoption of complementary metric is intended to assist decision makers in identifying people highly annoyed by aircraft noise, allowing the creation of mitigation measures in the affected areas.

ABSTRACT: Airport noise presents a major environmental impact arising from aircrafts airport activities, being one of the most complex and difficult mitigation problems. From the environmental point of view, airports cause serious problems to the population. Annoyance caused by noise was evaluated from the Day-Night Level (DNL) metrics proposed by Schultz. However, acoustic comfort is assessed separately during the day and at night, because the noise adverse effects are different. In this context, this paper presents a study on sound impact assessment related to noise annoyance caused by aircraft and aims to establish a method to analyze the sound impact on inhabited communities that are in the vicinity of airports. Besides, it proposes reviews available in literature and discusses noise annoyance exposure caused by transportation systems in an evolutive context. The study was based on criteria of evaluation levels panned for comfort of the community according to the Brazilian Standard ABNT/ NBR 10151. Therefore, a fuzzy logic system was developed in order to establish a relationship between the percentage of people highly annoyed by adverse noise effects around the airport, Day Equivalent Sound Level (LAeqD) and Night Equivalent Sound Level (LAeqN) metric descriptors.

Abstract: This paper presents the method to analyze the sensitivity of airport noise using computer simulation with the aid of Integrated Noise Model 7.0. The technique serves to support the selection of alternatives to better control aircraft noise, since it helps identify which areas of the noise curves experienced greater variation from changes in aircraft movements at a particular airport.