Acoustic Intelligence (ACINT) is part of the wider family of Intelligence Operations together with other technical intelligence (image intelligence, signal intelligence), human intelligence and open source intelligence (Figure 1).

For military forces protection, acoustic waves’ detection and processing can be key assets when no other detection clues are available. Acoustic detection is very effective to detect and identify non-cooperative targets. It is the case obviously, since a long time in sea surface and underwater warfare, with the use of Sonars. However, it is also the case for land forces and rotary wing air platforms used by land or air forces.