Professor Mohammad Al Faruque’s team has discovered that captured sounds from 3-D printers will allow the reverse engineering of source code, leading to a cyber-security threat to manufacturers. This finding is highlighted in the following articles:
http://www.newsweek.com/stealing-3d-printer-designs-sound-433147
http://science.sciencemag.org/content/352/6282/132.full
http://www.latimes.com/socal/daily-pilot/news/tn-dpt-me-0330-printing-hack-20160329-story.html