ESDU 94036
The prediction of sound attenuation as a result of propagation close to the ground.
Abstract:
ESDU 94036 calculates either a difference spectrum between a source and a point close to the ground or, knowing the spectrum at one point, the spectrum at another point. The effects of spherical spreading, atmospheric attenuation, and ground reflection may be treated separately or in any combination. For ground reflection, a two-parameter ground impedance model is used and atmospheric turbulence is treated through consideration of its effect on the coherence between the direct and reflected rays. Guidance on quantities required to define the ground impedance model and the turbulence level is provided. The input to and the output from the program, ESDUpac A9436, are illustrated by a worked example.Indexed under:
Details:
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This Data Item is complemented by the following software:
| Name | Details | ||||
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ESDUpac A9436 |
This program is only available to subscribers. |
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ESDUpac B9436 |
This program is only available to subscribers. |