Abstract
ABSTRACTOBJECTIVE To perform a quantitative analysis of the background noise at Congonhas Airport surroundings based on large sampling and measurements with no interruption.METHODS Measuring sites were chosen from 62 and 72 DNL (day-night-level) noise contours, in urban sites compatible with residential use. Fifteen sites were monitored for at least 168 hours without interruption or seven consecutive days. Data compilation was based on cross-reference between noise measurements and air traffic control records, and results were validated by airport meteorological reports. Preliminary diagnoses were established using the standard NBR-13368. Background noise values were calculated based on the Sound Exposure Level (SEL). Statistic parameters were calculated in one-hour intervals.RESULTS Only four of the fifteen sites assessed presented aircraft operations as a clear cause for the noise annoyance. Even so, it is possible to detect background noise levels above regulation limits during periods of low airport activity or when it closes at night.CONCLUSIONS All the sites monitored showed background noise levels above regulation limits between 7:00 and 21:00. In the intervals between 6:00-6:59 and 21:00-22:59 the noise data, when analyzed with the current airport operational characteristics, still allow the development of additional mitigating measures.
Highlights
The noise generated by aircraft operating in urban airports causes great dissatisfaction and annoyance for people who live nearby
It is possible to detect background noise levels above regulation limits during periods of low airport activity or when it closes at night
Since noise emission limits became more restrictive for civil aircraft in 2001 by the International Civil Aviation Organization (ICAO)a, the non-aircraft noise, known as “background noise”, has gained importance to determine diagnosis of noise pollution in airport surroundings, regarding the designing of the respective mitigating measures
Summary
The noise generated by aircraft operating in urban airports causes great dissatisfaction and annoyance for people who live nearby. Since noise emission limits became more restrictive for civil aircraft in 2001 by the International Civil Aviation Organization (ICAO)a, the non-aircraft noise, known as “background noise”, has gained importance to determine diagnosis of noise pollution in airport surroundings, regarding the designing (or development) of the respective mitigating measures. In tropical countries such as Brazil, the intensity of urban noise in general can be very high[14]. A vicious circle that contributes to degrade the population’s health
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