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    Powerhouse noise

    I have a hydro powerhouse with two 50MW generators. The generator housing is a fabricated steel structure approxamatly 30 ft dia, 12 feet high, inside a 50ft wide by 140 feet long, by 50 ft high building. There is a lot of resonate noise with a peak of 100dBA at 125 Hz. I am looking for a...

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