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Acoustical
Modeling
ATCO Noise Management's
acoustical  engineers
model noise mitigation measures for proposed or existing industrial
facilities. Our acoustical
models consider:
- individual equipment sound power levels
(point, line, area and building),
- source directivity,
- geometric
spreading,
- air absorption,
- ground effects,
- barriers,
- reflections,
- topography,
and
- meteorological
conditions.
The
model propagates the sound level values for each octave band and
source-receiver pair and produces a noise level contour map.
Our acoustical engineers
then model various mitigation options, so that noise declines to
the level required by the project specifications in the most cost-effective
way. To produce effective and economical noise reduction, our acoustical
engineers balance the historical database costs of one silencing
treatment against other treatments while manipulating plant layout,
equipment layout and building structure. We term this our "Balanced
Design Approach™".
In our "Balanced
Design Approach™", acoustical performance of each treatment
is "relaxed" or "enhanced" depending upon overall price. For example,
if increasing the noise reduction requirements of a turbine intake
silencer is less expensive than raising the STC (Sound Transmission
Class) of a building's walls, then an upgraded silencer will be
our recommendation.
Modeling
Software
Among other
tools, ATCO Noise Management uses SoundPLAN and Cadna-A computer
software to provide our customers with 3-D graphics of noise at
a site or facility. Output
from the software produces noise level contours from an untreated
and treated industrial site or facility. The noise level contours
are color coded-bright colors like purple and red depict high noise
levels while shades of green, grey and black show low noise levels.
Through Higgott-Kane, A Division of ATCO Noise Management, our experienced engineers use Computational Fluid Dynamics (CFD), Finite Element Analysis (FEA), proprietary acoustical design software, and R&D to test and validate the dynamic silencer performance and pressure drop characteristics.
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Noise
Levels Before Acoustical Treatment: |
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Noise
Levels After Acoustical Treatment:
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