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| Model Source Level Development |
Over and above the accurate calculation of noise propagation losses the most important aspect
of any noise model is the quality of the initial sound power levels used to represent each noise
source. No amount of computing power or software sophistication can compensate for
erroneous, vague or incomplete input information.
Consequently, nearly all the sound power levels we use as modeling inputs come from firsthand
field measurements of actual equipment in normal operation. Years of visiting industrial sites and
power plants has allowed us to build up an extensive and unique database of source sound
power levels for a wide variety of equipment, such as many makes and models of combustion
turbines, HRSG’s, gas compressors, pumps, fans, cooling towers, radiators, transformers,
blowers, etc.
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The derivation of sound power levels is challenging even in an ideal laboratory setting and it
takes considerable judgment, expertise and ingenuity to develop reliable levels under complex
field conditions where noise from many other extraneous sources is largely unavoidable.
Long experience comparing predicted/modeled far field levels of new facilities to subsequent
direct measurements of the completed facilities indicates that the source inputs being used are
valid and accurate.
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Noise Control for Industrial Facilities
