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.
Highlights
This paper seeks to clarify the importance of using additional metrics, those describing the noise impacts in places or situations sensitive to specific noises
The PBZR is developed based on operational profiles standardized and it consists of simplified geometric curves to facilitate the implementation of the Plan to small aerodromes, with fewer aircraft movements and don't have the resources to prepare PEZR
Proposal curve DNL 52.5 dB(A), based on NBR 10151, becomes an excellent tool for decision makers because the area of your curve is greater and is covering all critical points selected, another big advantage is that it approaches the area where are located almost all complaints about aircraft noise
Summary
This paper seeks to clarify the importance of using additional metrics, those describing the noise impacts in places or situations sensitive to specific noises. The history of aircraft noise is intimately linked to the rise of aviation, only from the 50s, with the emergence of large commercial jet aircraft and the increase the number of movements, this impact has been considered as critical This rationale explains the reasons that motivated the National Civil Aviation Agency - ANAC - to propose the Brazilian Civil Aviation Regulation - standard RBAC 161, "Zoning Plan Noise - PZR". The PEZR is drawn using INM© (Integrated Noise Model) software from specific operating profiles in order to better represent the physical and operational characteristics of each airport It defines more precisely in the Zoning limits the land uses which are compatible and incompatible with aircraft noise levels, with consequent less harm to society
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