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please answer A sound wave travels through air at 20 C. The decibel level at a distance of 16.2 m from the source is measured

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A sound wave travels through air at 20 C. The decibel level at a distance of 16.2 m from the source is measured to be 82.5 dB. What is the dB level at a position that is 7.39 m closer? Assume the density of air is 1.20 kg/m3 and that the source produces spherical wave fronts

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