“(ANOPP2v1.4.0) Aircraft NOise Prediction Program (ANOPP and ANOPP2)”(LAR-19861-1)

The NASA Aircraft Noise Prediction Program (ANOPP) provides a capability to predict noise from aircraft in flight including sources, propagation, and metrics. Since inception over 40 years ago, it has been maintained and updated including the ongoing development of new methods that are essential to more accurate physics-based prediction of modern and future aircraft noise. ANOPP2 provides a modern prediction environment with a flexible framework particularly necessary for unconventional aircraft noise studies. ANOPP2 is also designed to provide improved understanding of the fundamental physics to support experiments and flight research with the continuing development of new tools. Particularly for fixed wing aircraft prediction, ANOPP continues to provide essential prediction capabilities, therefore, both ANOPP and ANOPP2 together are required for most applications.