Purpose

Acoustic/seismic sensor platforms can be
used for various defense and security
applications: for battlefield surveillance as
well as for border protection, or perimeter
surveillance. Such systems rely on the fact
that acoustic sensors have a 360° fi eld of
view and that acoustic waves emitted
by military vehicles, airplanes or weapons,
can propagate over long distances, even
if there are obstacles between the source
and the Non Line-Of-Sight (NLOS) acoustic
sensors. ISL comptences include:

• algorithms for the detection and
  localization of snipers,
• a link with the acoustic or
  visual restitution of the threats. 

Example of a model of acoustic
antenna integrated in a helmet

Results

Acoustic Unattended Ground Sensors will
provide a major contribution to
the futures surveillance system for network
centric operations. The key applications are:

• situation awareness (detection and
  restitution of abnormal sound),
• detection of artillery and mortars,
• detection of vehicles or aerial platforms.

Visualization of the direction of localization
from 3 sensors

Skills

Theoretical tools based on numerical
modeling are developed for the
simulation of acoustic propagation
phenomena and for performance analysis.
Realistic meteorological profi les, as
well as relevant parameters for the acoustic
properties of the environment, are
key factors for appropriate simulations. 

Map of the acoustic attenuation (simulation)

Facilities

• Anechoic room, reverberant chamber, etc.
• Spectrum analyzers, scanning vibrometer
• Artificial head, microphonic antennas.

View of the anechoic room for acoustic studies