Substantial discussion:

https://news.ycombinator.com/item?id=6927905 (tau.ac.il) (94 comments)

More discussion:

https://news.ycombinator.com/item?id=6948526 (schneier.com) (34 comments)

Other submissions:

https://news.ycombinator.com/item?id=6940827 (theregister.co.uk)

https://news.ycombinator.com/item?id=6938536 (dailymail.co.uk)

https://news.ycombinator.com/item?id=6935289 (tau.ac.il)

https://news.ycombinator.com/item?id=6933255 (slashdot.org)

https://news.ycombinator.com/item?id=6932445 (slideshare.net)

HN guidelines for submissions are to post the original source for a story, which is linked in the article. http://www.cs.tau.ac.il/~tromer/acoustic/ This has been posted efore with lots of discussion. http://news.ycombinator.com/item?id=6927905