Article,
Traffic noise spectrum analysis-Dynamic modeling vs experimental observations
Applied Acoustics, (2010)
Abstract
This paper compares two traffic representations for the assessment
of urban noise frequency spectrum: (i) a static one, based on mean
vehicle speeds and flow rates, (ii) a dynamic one, which considers
vehicle interactions along the network. The two representations are
compared on their suitability to match real on-field noise levels,
recorded on a three lane quite busy street. Representation (i) fails
in reproducing spectra envelopes that correspond to this site. In
particular, it underestimates low frequencies, what can conceal the
real impact of traffic flow on urban sound quality. Representation
(ii) greatly improves estimation. It guarantees accurate environmental
noise assessment, since it reproduces all traffic situations that
are encountered in the site. Moreover, its 1s-based structure allows
for the evaluation of spectra variations, with a good accuracy.
