spund frequemcies of hidden listening devices

Your radio suddenly encounters some type of interference – Many amateur and spy shop eavesdropping devices use frequencies within or just outside the FM radio band, these signals tend to drift and will “quiet” an FM radio in the vicinity of the bug. Of course it may also be nothing more then a fax machine or modem calling the wrong number (but a TSCM person should evaluate the situation to make sure). This is also a key indicator of a harmonica bug, or infinity transmitter being used. Your phone often rings and nobody is there, or a very faint tone, or high pitched squeal/beep is heard for a fraction of a second – This is an indicator of a slave device, or line extender being used on your phone line. There is probably somebody listening to everything you say or do within twenty feet of the telephone (if this is happening). Sounds coming from your phones handset when it’s hung up – This is often caused by a hook switch bypass, which turns the telephone receiver into a eavesdropping microphone (and also a speaker). It could be nothing more then a problem with your phone line or instrument, but a TSCM person should evaluate the situation to make sure. This is also a sign that an amateur eavesdropper or poorly trained spy is playing with your phone lines.

Static, popping, or scratching sounds on your phone lines – This is caused by the capacitive discharge which occurs when two conductors are connected together (such as a bug or wiretap on a phone line). Professional eavesdroppers and their equipment usually do not make such noises so if this is going on it could indicate that an amateur eavesdropper is listening in. Surveillance devices often cause slight anomalies on the telephone line such a volume shift or drop-out. Unusual sounds or volume changes on your phone lines – This is commonly caused by an amateur eavesdropper when they attach a wiretap, or activate a similar listening device. How would you like the plans for the corporate takeovers you’re planning to become public knowledge? Would copies of your product designs be of any use to your competitors? Would it be beneficial for your competitors to know how much you’re quoting for the same project? Secret meetings and bids seem to be less than secret – Confidential meetings and bids are very popular targets for corporate spies. When your competitors know things that are obviously private, or the media finds out about things they should not know, then it is reasonable to suspect technical eavesdropping or bugging. Often the loss of your secrets will show up in very subtle ways so you should always trust your instincts in this matter. Theft of confidential information is a multi-billion dollar underground industry in the United States. Others know your confidential business or professional trade secrets – This is the most obvious indicator of covert eavesdropping activities.

People seem to know your activities when they shouldn’t. Nonetheless, each year our team is successful in locating electronic eavesdropping devices planted in businesses and private residences alike.

Although this type of crime does occur, over 20+ years of experience, the number of instances are actually quite small and usually involve someone who has significant resources and motive to engage in illegal eavesdropping, which carries significant periods of incarceration if convicted. There are a number of signs that a home, office, vehicle or even telephone have been “bugged” by someone using an electronic listening device.

Spund frequemcies of hidden listening devices