Interested in night-time noise? A view from Europe

Here's a link to a lengthy guidance document from the European office of the World Health Organization on the subject of night-time noise.   We'd be glad to hear from any readers who are willing to peruse this whole thing & tell us how it may be of help in dealing with the noise problems that arise from operations at Sea-Tac and Boeing Field. 

Readers will recall that there is a night-time noise element in the INM computer model that draws the 65 DNL contour maps relied on by the Port of Seattle as the only way to measure bad impacts from noise.  (long sentence!  sorry!)  What are the implications if the European guidance were to be included in the INM?

If the link fails, here's the URL that you can paste into your brower in the usual way:

http://www.euro.who.int/document/e92845.pdf