Abstract
The questions are many; the answers I have are few, so I may call upon attendees of this session for help. Who should create policy for the acoustic environment? The F AA(aviation)? FHW A(roads)? DOE(energy)? DOD(defense)? or EPA? or DOI(interior/Park Service)? For example, it has been estimated that about 20 to 30% of the population are noise sensitive? Should policy be based on this minority or on the less sensitive majority? Currently, FAA and DOD allege that their criterion, DNL equal to 65 dB results in about 10 percent highly annoyed; the real percentage is 20 to 30%, so their criterion “protects” only the less sensitive. In a National Park, we are finding that hikers on a moderate length hike (about 4 to 10 km; 2 to 5 h) judge the pleasantness of the acoustic environment during the entire hike largely on the presence or absence of anthropogenic sound. Again there are factions to consider. Roughly 1/3 rate the overall pleasantness on the most pleasant portion of the hike, 1/6 rate on the least pleasant (most unpleasant), 1/6 on the average, and 1/3 on the most recent. What do we do? What should ASA do? Standards? WHY?
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