The assembled laser and receiver modules may be placed on video tripods and temporarily aligned for limited performance demonstration systems.
They may also be enclosed as shown in the instructions for use as a field worthy device with a potential range of up to 500 feet. May be used as a long range laser voice communicator with a range usable to 10 miles line of sight.
Low cost audio surveillance science project or useful device for listening to power line faults, over pressured pipes, etc.
amazing1.com
Laser Listener
We advise those that work near window areas to be aware of laser eavesdropping and to maintain that the windows in boardrooms, executive offices and any where that sensitive discussions take place, should have the blinds closed.
Those blinds should also be constructed of a dense material that is capable of protecting the audio from inside of the room to reduce vibration on the window areas that audio laser eavesdropping equipment may be pointed at.
Using a protection device like the Portable Noise Generator for protection against laser eavesdropping in those vulnerable window areas is another way to protect your sensitive audio information.
Portable Noise Generator
The PNG-200 is designed as a portable acoustic noise-generating unit that can be used in a variety of ways.
The noise generating circuitry has been optimized for voice band noise masking against listening devices and is designed to reduce the effectiveness of eavesdropping devices such as microphones and tape recorders.
When multiple units are used in concert, a complete environment masking system can be easily installed in any environment.
The PNG-200 can be mounted to smooth surfaces using suctions cups or simply placed in an area that potential eavesdropping devices may be present.
PNG-200 Advantages: Optimized voice band noise masking for acoustic interference against listening devices. (Acoustic noise is tailored to voice frequencies).
Mounts easily to windows using suction cup (included) to defeat the high tech laser threats.
Mounts easily to walls for protection against listening devices that rely on acoustic leakage (i.e. contact mics, spike mics, human ear).
Portable: Can be carried easily in coat pocket. Multiple units fit easily in a briefcase.
Stylish anodized aluminum construction designed for ruggedness and portability.
Specifications:
• Weight: 12 oz. (340.2 g)
• Audio Frequency Range: 300 Hz - 3 KHz
• Output Sound Level: MAX 92 dB @ 4 ft.
• Power: 2 x 9V alkaline batteries or AC transformer (120 or 240)
• Typical Battery Life:
• 7 hrs. at 1/2 level
• 2 hrs. at full level.
Includes:
• Carrying case
• AC transformer
• Suction cup window/wall mounting kit.
PJL 9th September 2010
