Remote listening system

Technical Specifications

DISTINCTIVE FEATURES

� Acoustic surveillance/observation up to 300m

� Verbal communication can be retrieved from materials

such as metallic elements, cloths, paper and plastic.

� Can operate from any angle

� Easy to use

� Fast and simple start to work and target aiming

� The unit is safe for the eyes and totally stealth

� Noise robust, no interference from surrounding noise

� Requires the minimum vibrating of surfaces to allow

surveillance via windows, f.e. in vehicles, rooms, etc.

� Operates via window/small openings

� No physical entering needed for installation

� Can operate with any target surface

� Highest level of speech intelligibility

The unit provides a range of benefits for those in the

field who need to perform surveillance. The device uses

the unique interferometric laser technology, which makes

it a top choice for this type of work. It features an unseen

infrared laser along with advanced DSP technologies. This

allows for great speech detection and speech intelligibility

even when the operating in noisy environments.

This device has the ability to detect vibrations caused by

speech at various angles and on many surfaces. It does not

matter if the targets are inside the building (office, apartment,

etc) or outside. The backscatter laser light frequency shift

makes it possible for the speech to be extracted. This makes

the technology fully robust to various surfaces and laser

intensity.

The unit has a fantastic operating range with minimum laser

power, providing high performance surveillance, while still

being safe. The device also happens to be quite easy to use.

APPLICATION:

The unit is used to

perform surveillance and

record speech of a person

who might be up to

300m away, in a vehicle,

building, or elsewhere. The

microphone picks up on

surface vibrations, and it

has the power to do all of

this independent from the

target optical conditions.

The laser is unseen by human eyes or common cameras.

This allows users to target those in closed rooms through

windows. During operation the system eliminates ambient

interferences, noises.

How It Works

The sensor can collect the vibrations in various surfaces,

as mentioned. It can detect speech, and the best sensitivity

occurs when objects are thin, soft, or lightweight. Some of

the targets that could be used include papers, leaves on

a plant indoors, pictures hanging on a wall, seat cushions,

window panes, and clothing. The beam detects vibrations,

turns them into an electrical signal and then amplifies them

and creates an audible output.

The vibrations, caused by a speaker, cause a backscatter

laser light frequency (Doppler) shift. This shift is then

extracted from the laser light. After that, the signal will pass

through decoding and convertion to standard audio signal.