Limitations imposed by nonlinear phenomena on computation of acoustic paths

Details Limitations imposed by nonlinear phenomena on computation of acoustic paths Limitations imposed by nonlinear phenomena on computation of acoustic paths

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ge%26ae..49.1063p&link_type=abstract

Geomagnetism and Aeronomy, Volume 49, Issue 7, pp.1063-1068

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Scientific paper

Approaches for estimating the influence of nonlinear effects on long-distance propagation of acoustic signals in an isothermal atmosphere are developed. It has been indicated that nonlinear effects can be ignored on paths up to 3000 km at beam angles smaller than 35° (nonlinear absorption). However, the spectrum will be pronouncedly distorted at these distances due to the generation of new harmonics (for initial Mach numbers about 10-4).

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