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Measurements on polystyrene foam Different thicknesses Measure and calculate Leq for different thicknesses of polystyrene foam. What does the dependency look like? Different widths You will be given a set of rectangular pieces of polystyrene foam, with different side sizes. Measure and calculate Leq for different widths of polystyrene foam. How do you think the graph would look like? Why do you think you observe a difference in GMS signal for different sizes? Explain. Measurements on balsa wood Measure and calculate the Leq for a piece of balsa wood. Consider the actual size of the sample and compare with the measured Leq· Does the actual size correspond to the measured Leq? Why or why not? 17
