این مقاله جالب و کاربردی به صورت بسیار جالب نحوه تشخیص و یافتن دوربین های مخفی را بررسی و نشان می دهد
How to find hidden cameras
During the last few years the number of surveillance cameras has grown out of bounds. Cameras have been installed in many public and semi-public places such as universities , streets, supermarkets, gas stations, parking garages, cinemas, bars, shops, busses, train stations and even discos. About 25 million CCTV1 cameras are estimated to be in operation worldwide at the time of writing . Some countries, notably Great Britain, are trying to fully cover every corner of public life with cameras. The Privacy International CCTV page  states that between 225 and 450 Million Dollars are spent on surveillance technology in Britain per year, involving an estimated 300.000 cameras. These efforts result in a person driving through the city of London being filmed at least once every five minutes . In the near future cameras may even be installed in all taxis, keeping an eye on the passengers . In Houston, Texas, about 400 cabs have been equipped with such cameras . It may not be obvious right away why it could be of any importance to anyone to be able to locate hidden cameras. Some will reason that concealed cameras are more or less exotic and thus knowledge on how to find them is not necessary at all. Others even consider interest in how to locate hidden cameras to border the criminal. Both parties err, as shall be illustrated in the following. Contrary to common belief, hidden cameras are nowhere close to exotic. In 1996 David Fletcher, chief executive of the British Security Industry Association, estimated that employers were spending 12 million british pounds a year on covert camera equipment to monitor their staff [7, p.49]. A survey conducted by the American Management Association found that “33 percent of major U.S. firms say they tape employees – overtly or covertly – to counter theft, violence, or sabotage” . There have been several reports of staff being monitored in changing rooms without their consent . Subminiature cameras were even discovered by the author of this paper during treatment at an oral surgeon’s practice: the camera was plastered into the ceiling next to a ceiling light.
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