Controlling where sound goes is difficult because of a phenomenon called diffraction – the tendency of sound waves to spread out as they travel. This effect is particularly strong for low-frequency ...

Acoem ATD technology detects both the muzzle blast and the ballistic sound wave of a bullet in motion, allowing detection and ...

The protests were ignited following the deaths of 15 people, who were killed when a concrete canopy collapsed at a train ...

Fourteen police officers were injured by an extremely loud siren at an anti-AfD demonstration in Berlin's Wittenau district, with five requiring hospital treatment. The incident occurred on Sunday ...