A complementary metric to define a buffer zone in brazilian airports

Abstract

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.

Noise metrics analysis in schools near airports: A Brazilian case study

“…Therefore, it is difficult to reconcile the criteria covering acoustical issues and land use around airports. This is a concern already presented by some national studies [31][32][33]. It is known that the noise level presented by cumulative or averaged metrics tends to "dilute" noise levels with short duration, even with high amplitude.…”

Background noise analysis in urban airport surroundings of Brazilian cities, Congonhas Airport, São Paulo

“…The sectors 00, 03, and 05 were previously disregarded for the study, either because the area’s relief favors a strong aircraft noise attenuation or because the aircraft fly over the homes at higher altitudes. Within the sectors 01, 02, and 04, the fifteen measuring sites were chosen in a similar way to that described by Carvalho et al 5 (2014), who adopted the identification of “sensitive points” (activities of public or collective nature, compatible with the residential use, such as education and health).…”

Comportamento e análise do ruído ferroviário na cidade de Santa Maria

“…Na busca e interpretação dos dados e na inexistência de normas especificas para o estudo, o método utilizado foi encontrado na NBR 10151, o qual é dito como medição do nível de pressão sonora equivalente em resposta rápida A (LAeq). Essa mesma norma foi também utilizada por Carvalho et. al (2014) para prever curvas de ruído em aeroportos empregando LAeq.…”