Aerospace

3D Sound Intensity streamlines

3D_intensity2 3D_intensity1 3D_intensity3 3D_intensity4 Click to enlarge

Contrary to common belief, sound waves don’t propagate in straight lines. In the cabin, obstructions like seats or narrowing aisles because of lavatories influence the curvatures of the sound waves. Usually an extremely complex sound field is present because of the many different scattering and absorbing surfaces. Sound intensity is a vector value which has both a magnitude and direction. Using a 3D USP probe the sound vector field can be visualized and mapped. The results demonstrate that even with a single sound source, the 3D intensity streamlines are strongly bending, suggesting that far field techniques do not point towards the sound source.

 

 

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