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Empire editorial: Good progress on noise abatement

...results proved that the turbine engines were significantly quieter. For the sake of comparison, noise from a passenger car traveling on a roadway 25 feet away measures 77 decibels (dBA), a jet on departure registers 96 dBA, and normal speech...

http://www.juneauempire.com/stories/080303/opi_edboard.shtml
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