Análisis de la incertidumbre asociada al georreferenciamiento de mediciones de ruido ambiental en la calibración de mapas de ruido

This research proposes a methodology to quantify the uncertainty effect associated with the georeferencing process in noise maps calibration, based on the calculation of the expanded uncertainty proposed by the P hD.M iguelAusejoP rieto. Field measurements were made with two simultaneous sound level meters, one of them varied it’s location taking into account the maximum tolerance that three different GPS devices have; the other level meter remained fixed at one point in order to have a reference to make a comparison between the captured simultaneously levels by the two sound level meters. The measurements were carried out in three different scenarios, in two configurations, in the peak and valley schedules and considering that the main source of noise was road traffic. In addition, this procedure was recreated by simulation methods using the German model RLS-90. With the levels obtained the calculation of the expanded uncertainty was made, taking into account a coverage factor K = 2, which guarantees a confidence level of 95,45%. On the one hand the ± 3 dB criterion was evaluated, for the uncertainty levels obtained by the fixed sound level meter and the other hand, for the uncertainty levels found in the combination of the fixed and mobile sound level meter, including the biggest desviations in each one of them. Both in the results of the measurement in the simulation process there was not enough evidence to state that the accuracy of a GPS affects the calibration of a noise map, this was verified using the Wilcoxon’s rank test, which evaluates if the difference between two random samples differ significantly from zero

• Autores: Puerta Pareja, Juan Ricardo; Cuervo Ospina, Guillermo Andrés
• Fecha de publicación: 2019
• Institución: Universidad de San Buenaventura
• Repositorio: Repositorio USB
• Idioma: spa
• OAI Identifier: oai:bibliotecadigital.usb.edu.co:10819/7000
• Acceso en línea: http://hdl.handle.net/10819/7000
• Palabra clave: Incertidumbre; Georreferenciación; Validación; Mapa de ruido; Calibración; Uncertainty; Georeferencing; Validation; Noise map; Calibration; Incertidumbre (ingeniería); Medición acústicas; Sistema de posicionamiento global; Sonómetro; Ruido
• License: Atribución-NoComercial-SinDerivadas 2.5 Colombia