Question: A physics student is bothered by the constant loud noise just outside of her building. Using a phone app to measure sound intensity level, she

A physics student is bothered by the constant loud noise just outside of her building. Using a phone app to measure sound intensity level, she determines that the noise at her desk is 73 dB with the window open and 53 dB with the window shut. How much reduction in intensity of the sound reaching her desk was achieved by shutting the window? Explanations and maths showing working out.

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