A team of Ford engineers spend their days dreaming up sounds and subjecting them to a battery of tests to determine which warnings help drivers best react to possible dangers and work in harmony with ...

The air raid warning system was developed in 1938/9. The sound of the 'warning' signal and the 'all clear' would become very familiar to people living in large cities in Britain. Air raid sirens ...

Air-raid siren sounds the warning. Air-raid sirens first sounded the warning in London in September 1939. They became an almost daily part of life in the capital a year later during the height of ...