White noise generator
This white noise generator defeats such listening devices as hidden microphones buried in a wall, transmitters located in AC outlets and laser/microwave reflection from windows. This is accomplished by producing a security blanket of generated noise completely covering your private conversations with unfilterable sound, thus ensuring a private conversation.
The masking system injects noise into the environment perimeter and not directly into the environment. This approach allows normal conversation while defeating eavesdropping devices that rely on acoustic leakage.