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From page 32... ...
TR N EW S 28 8 SE PT EM BE R– O CT O BE R 20 13 32 Polcak is Senior Transportation Engineer, Maryland State Highway Administration, Baltimore. Miller is Senior Vice President, Harris Miller Miller & Hanson, Inc., Burlington, Massachusetts.
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From page 33... ...
TR N EW S 288 SEPTEM BER–O CTO BER 2013 33 tively reducing the impacts of noise in communities near transportation facilities. Whether the facility is a commuter rail line, an airport, or a major highway, the overarching efforts since the landmark environmental regulations of the early 1970s have focused on these two components in the approach to noise control.
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From page 34... ...
TR N EW S 28 8 SE PT EM BE R– O CT O BE R 20 13 34 Influencing Perception These efforts at quieting or altering the character of particular sources or subsources of noise are important to the soundscape approach. Traditional noise abatement seeks to reduce offending or unwanted sounds according to established numerical criteria or limits; in contrast, the soundscape approach focuses on the human perception of the acoustic environment and on "sounds of preference" (8)
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From page 35... ...
TR N EW S 288 SEPTEM BER–O CTO BER 2013 35 of such traditional abatement measures as noise barriers, although absorptive or quieter pavements may be effective in reducing the prominence or at least in altering the character of the traffic noise. Assessing Community Impact In the suburban setting, the traditional approach to traffic noise abatement is focused on substantially reducing the noise level from the highway source.
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From page 36... ...
TR N EW S 28 8 SE PT EM BE R– O CT O BE R 20 13 36 physical effects of traditional traffic noise control measures affect the soundscape as a whole. The consideration of soundscape as a gauge of environmental quality, however, has an inherent complication -- multiple variables, contextual and subjective, influence individuals' perceptions of the sonic environment (9)
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From page 37... ...
TR N EW S 288 SEPTEM BER–O CTO BER 2013 37 lications, Vancouver, British Columbia, Canada, 1978.
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