via theregister.com
"Sriram Sami, Bangjie Sun, and Sean Rui Xiang Tan, from National University of Singapore, and Jun Han from Yonsei University, describe how this might be done in a paper [PDF] titled "LAPD: Hidden Spy Camera Detection using Smartphone Time-of-Flight Sensors"...
...smartphones are commonplace these days, so adding an app like LAPD is likely to be more convenient than carrying a dedicated bug or signal detector at all times. LAPD's goal is to be accessible, usable, and accurate, and to judge by the results reported in the paper, it hits those marks...
"The 'attackers' have all the power to place hidden cameras anywhere, and the public is, in contrast, generally defenseless," he explained. "That's why we're doing this work, and why we hope hidden camera detection can become more commonplace." Sami said he intends to release the source code for LAPD but has to coordinate that with his colleagues." more
