Engineering, 14.09.2019 01:30, jahjah1158

The sound pressure level from a fan is measured to be 65 db at 3 m from the source. it can be assumed that the fan can be treated as a point source for the measurement. estimate the sound power of the fan if it is now placed in a 0.2 m x 0.2 m square duct. also, estimate the sound pressure level in the duct.

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The sound pressure level from a fan is measured to be 65 db at 3 m from the source. it can be assume...