NASA Glenn Research Center researchers are developing theory and software to predict noise from aircraft engines, supporting the design and analysis of new propulsion systems. A NASA page published on October 19, 2026, describes ten codes that can be requested through the agency's Software Catalog.

The jet noise code JeNo uses Lilley's Acoustic Analogy with mean flow solutions from a Reynolds-Averaged Navier-Stokes code, with its acoustic predictions depending on accurate aerodynamic predictions. JeNo, which calculates far-field sound spectral density for axisymmetric jets at a user-specified observer location and frequency range, has been validated for subsonic and low supersonic, unheated axisymmetric jets. Its predecessor MGBK was used to analyze the noise-reduction benefits of chevrons, the serrations on turbofan nozzle edges.

Other tools target different sources. V072 and TFaNS address rotor/stator interaction tone noise, while Linflux models realistic three-dimensional flows and blade geometries at higher computational cost. BFANS and RSI calculate broadband noise, WOBBLE computes propeller tone noise with varying inflow, and MPT estimates multiple pure tone or "buzz saw" noise. ADPAC, developed by the Allison Engine Company under NASA Glenn contracts, solves coupled internal and external flows in short-duct turbofan engines.