An app that can pinpoint a gunman’s location simply by analysing the sound and shockwaves from a gunshot have been revealed by US researchers.

The Android app can show a map of exactly where the gunman is located, and is expected to be developed for military and police use in the war on terror.

Experts at Vanderbilt University can replicate systems that cost millions of pounds are are so large they have to be installed in vehicles.

The new version, however, simply requires a smartphone and a small box around the size of a deck of cards containing highly sensitive microphones and shockwave sensors.

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