Desenvolvimento de métodos para determinação de parâmetros geoacústicos do fundo a partir de dados de ruído irradiado de navios de oportunidade na raia acústica de Arraial do Cabo

Abstract

In this dissertation, propagation models to estimate the geoacoustic parameters of the fund are presented. To obtain these parameters (bottom speed, bottom density, surface loss parameter), measurement data obtained in the acoustic range of arraial do cabo are initially treated, filtered in order to reduce the interference present in the chosen run, these are stored in matrix form. A second similar matrix is generated in the simulations, using the Lloyd Mirror effect theory implemented in the form of models, given that these models are a simplification of what happens in the real world, it is sought through an iterative and fine-tuning process, to obtain correlation coefficients greater than 0.7 between these two matrices, the choice of parameters in the simulation were guided by coherent or known values from the bibliography. In this work, correlation coefficients greater than 0.7 and less than or equal to 0.9 were obtained. This range of correlation values guarantees the efficiency of the models.