Spy Review

This is something a little different for you, a device that claims to interfere with microphones by generating random noise on a variety of frequencies. The random sounds are meant to desensitise nearby microphones from tape recorders, RF bug transmitters, hard-wired microphones, contact microphones and parabolic microphones.

Since the sounds generated by the jammer vary in both frequency and amplitude randomly, the sound is very difficult to filter out using computer software. Therefore the sound offers a degree of protection against eavesdropping devices by providing a mask of sound over your conversations.

Theoretically, the idea behind this device is reasonable. As long as this device is generating more noise than you are when talking, then the microphones will only be able to hear the random noise. Strictly speaking this device is a random noise generator rather than a microphone since microphones are not rendered inoperable.

The Digital Audio Jammer from Cell-Phone-Jammers.com looks more attractive, but is very expensive and most of the supporting information pages are broken. The Portable Privacy Audio Jammer from SpyGearCo.com is much cheaper, but the device looks a great deal more functional rather than attractive. I still remain dubious that such a device would be as effective as claimed, and therefore I would insist on a demonstration of this gadget using some of my own microphone-based gadgets, such as a bug, contact microphone and possibly a shotgun microphone.