Reply to Airplane noise concerns overblown?

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]I really think if people were willing to be honest and vocal, we could have a chance at positive change.
For some reason in DC it’s too high of a bar! There are still people in the Spring Valley refusing to have their lots addressed. If you ignore it, it’s not there, right? And you can punk the next buyer.[/quote]

Look DC does not have congressional representation. The planes have to fly over someone house and DC will cause the airport authority the least problems. [/quote]

That fact that they don’t have the balls to take real decibel readings in Bethesda is telling. Put the device on top of every school, especially the ones up on hills, and report back.  Simulated decibel studies are BS, as are ones from a boat on the river. Do the actual tests. What are the lawyers waiting for? [/quote]

There’s something to that. Areas in DC under the flight path are apparently 55-65 dB average. But here’s what that average really means:

A 65 dB average “is equivalent to 87.5 dBA [dBA is a weighted measure of what a human hears even though the noise might be greater] with 500 events, 94.4 dBA with 100 events, and 97.4 dBA with 50 events. A single event at 97.4 dBA, while considered somewhat “acceptable” under the 65 DNL threshold would actually be equivalent to the noise from a power mower or a newspaper press. In other words, because of the “averaging” effect of DNL noise measurements, a person could be abruptly aroused from sleep every night, but the remaining 24 hours of quiet would result in a DNL measurement that would be very low, yet erroneously suggesting that there was no annoyance.”[/quote]

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