Recent developments in the NASA auralization framework

Abstract

The NASA Auralization Framework (NAF) is an open software architecture that facilitates the conversion of numerical noise data, specifically aircraft flyover noise, into an audible pressure-time history that may be further analyzed or used as stimuli in psychoacoustic studies. The framework provides a set of libraries for management of the auditory scene and propagation paths, synthesis of simple sources, and a basic environment including a uniform standard atmosphere and hard flat ground. Advanced capabilities may be added in the form of dynamic-link library plugins either developed by the user or provided by NASA as pre-compiled binaries. Recent additions to the NASA collection of advanced plugins include synthesis of periodic noise sources, enhanced ground reflection and impedance models, an atmospheric turbulence model, a post-processing module for computing sound quality metrics, and an interface with the Aircraft NOise Prediction Program 2 (ANOPP2). This presentation highlights these advanced capabilities as they relate to current NASA research into noise from existing and proposed aircraft designs.The NASA Auralization Framework (NAF) is an open software architecture that facilitates the conversion of numerical noise data, specifically aircraft flyover noise, into an audible pressure-time history that may be further analyzed or used as stimuli in psychoacoustic studies. The framework provides a set of libraries for management of the auditory scene and propagation paths, synthesis of simple sources, and a basic environment including a uniform standard atmosphere and hard flat ground. Advanced capabilities may be added in the form of dynamic-link library plugins either developed by the user or provided by NASA as pre-compiled binaries. Recent additions to the NASA collection of advanced plugins include synthesis of periodic noise sources, enhanced ground reflection and impedance models, an atmospheric turbulence model, a post-processing module for computing sound quality metrics, and an interface with the Aircraft NOise Prediction Program 2 (ANOPP2). This presentation highlights these advanced capabi...