Noise Level produced, inside 'Zone 2' of NZP, by aircraft operations at Salgado Filho International Airport, in Porto Alegre, RS, Brazil

摘要

This is This paper summarizes part of a Master's dissertation elaborated in the course of Civil Engineering of the Federal University of Rio Grande do Sul, and presents results related to the levels of noise caused by landings and take-offs of aircraft operating in Runway 29 at Salgado Filho International Airport in the city of Porto Alegre, Brazil. The paper presents the noise levels of the different equipment (aircraft models) registered in the period, and analyses whether there is a correspondence between the two Brazilian rules in force, in connection with the acoustic area. We checked up whether the levels of acoustic insulation as set by NBR 8572 meet the levels of acoustic comfort established by NBR 10152. The acoustic registrations have been made in one single spot inside "Area 2" of the NZSP - Noise Zoning Specific Plan for the city of Porto Alegre, and take the SEL rate into consideration for such analysis. The plan is approved by Instruction 1.145/GM5 of the Air Force, which also sets the specific plans of all 66 Brazilian airports administered by INFRAERO. We have counted on INFRAERO collaboration for identifying the aircraft and obtaining meteorological data. In order to analyze the results, we have used the Evaluator software, kindly provided by the firm Bruel & Kjaer, through which we were able to subtract the "events" (an aircraft passing by), identified in the acoustic measurements, and get the results for background noise without the aircraft being present. Such methodology has enabled us to exactly assess the sound impact caused by aircraft noise at the spot under study. The data acquisition procedures meet ISO 38911978 (Procedure for describing aircraft noise heard on the ground), and STNA Guide Monitoring (Monitorage bruit et trajectories d'avions).