L. Danielle Koch
YOU?
Author Swipe
View article: Numerical Modelling of a Potential Oceanic Impact Structure
Numerical Modelling of a Potential Oceanic Impact Structure Open
. IntroductionCompared to other planetary bodies, terrestrial impact craters can be rather difficult to discover due to different geological processes, including sedimentation and erosion, that modify and eventually erase the original impa…
View article: NASA's Bio-Inspired Acoustic Absorber Concept
NASA's Bio-Inspired Acoustic Absorber Concept Open
Transportation noise pollutes our worlds cities, suburbs, parks, and wilderness areas. NASAs fundamental research in aviation acoustics is helping to find innovative solutions to this multifaceted problem. NASA is learning from nature to d…
View article: Investigation of a Bio-Inspired Liner Concept
Investigation of a Bio-Inspired Liner Concept Open
Four samples of natural reeds, Phragmites australis, were tested in the NASA Langley and Glenn Normal Incidence Impedance Tubes in order to experimentally determine the acoustic absorption coefficients as a function of frequency from 400 t…