anti-noise barrier

The following images show the passage from mathematical model, to simulations, to reality. In between, experimental verification of the localization was performed in the lab, and real acoustic tests of the pre-final product were perfomed in an anechoic chamber as well as in an exterior setting.

A commercial product patented under the name Fractal Wall®, based on this twin, absorbs on average 98% of the incident acoustic energy in the audio spectrum, for normalized traffic noise.

Details of the twin and simulation results can be found in our paper (Felix et al., 2007) and the ASA presentation.

References

1. JSV

   Localization and increased damping in irregular acoustic cavities

   Felix, Simon, Asch, Mark, Filoche, Marcel, and Sapoval, Bernard

   Journal of Sound and Vibration 2007

   Bib HTML

   @article{Felix2007,
     title = {Localization and increased damping in irregular acoustic cavities},
     author = {Felix, Simon and Asch, Mark and Filoche, Marcel and Sapoval, Bernard},
     journal = {Journal of Sound and Vibration},
     year = {2007},
     pages = {965--976},
     volume = {4-5},
     owner = {mkaa},
     abbr = {JSV},
     bibtex_show = {true},
     html = {http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.329.2965&rep=rep1&type=pdf}
   }