Question: A square ventilating duct measures 0 . 3 m on each side. A Helmholtz resonator band filter is constructed by drilling a hole of 0

A square ventilating duct measures 0.3m on each side. A Helmholtz resonator band filter is constructed by drilling a hole of 0.08m radius in one wall of the duct leading into a surrounding closed chamber of volume V.(a) What volume V is required to filter sounds most effectively at 30Hz?(b) What will be the power transmission coefficient of the filter at 60Hz

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