Outdoor live sound is best controlled at the sound source; computer simulation tools are available to estimate impact of concerts on nearby communities using methods such as NORD 2000, ISO 9613-2, and CNOSSOS. These methods utilize generalized temperature gradients and wind speed profiles up to 100 m and can be useful and somewhat accurate up to 3 miles, after which higher level atmospheric effects takeover. This paper will provide some examples of long rang propagation due to higher level atmospheric effects, compare 3 mile radius modeling to real-time measurements and examine some of the fluctuations over a 2-h simulated concert with changing weather conditions and programming.
Topics
Acoustic signal processing
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2022
Acoustical Society of America