The air raid sirens sounded when approaching bombers were picked up on radar or were seen crossing the coast and heading for large cities. The sirens warned people to head for air raid shelters or to take cover in their own homes. When the danger was over, the sirens sounded again with a different tone to signify 'all clear'.
The sirens used during World War 2 were generally referred to as air raid sirens. They were used to warn civilians of impending air raids and to signal the need to seek shelter in bunkers or underground spaces. The sirens served as a crucial method of alerting the population to the danger of aerial bombings.
The A.R.P. are the air raid percausion
around 1799 the first siren was invented by the Scottish natural philosopher (physicist) John Robinson. Originally Robison's sirens were used as musical instruments. They powered some of the pipes in church organs.
In Britain, like everyone else, they went down to the air-raid shelters (usually the Underground railway stations), if they lived in the city. In the suburbs, they went into so-called Anderson shelters dug into backyards.
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air raid sirens would signal there was going to be an air attack when this happened people would cram into air raid shelters
They usually lasted for about 2 minutes
Air raid sirens would sound the 'all clear'.
Answer: Air Raid sirens. --------------------------------------------- the enemy is coming to kill us run for y'all lives
Air raid sirens were put up to warn civilians.
They were all removed at the end of the Cold War about 20 years ago.
The air raid sirens sounded when approaching bombers were picked up on radar or were seen crossing the coast and heading for large cities. The sirens warned people to head for air raid shelters or to take cover in their own homes. When the danger was over, the sirens sounded again with a different tone to signify 'all clear'.
Tornado sirens are warning sirens set up in some communities that sound in the event of a tornado warning. This is an effective way of alerting people to danger if they are not tuned into a TV or radio. Many of these are recomissioned air-raid sirens from the Cold War.
The sirens used during World War 2 were generally referred to as air raid sirens. They were used to warn civilians of impending air raids and to signal the need to seek shelter in bunkers or underground spaces. The sirens served as a crucial method of alerting the population to the danger of aerial bombings.
Go out and buy a World War 2 documentary. I remember once as a child hearing the air raid sirens all go off in wakefield, UK. Yes you could go and buy a video from world war two, you could search 'carter air raid siren' on the web... Carter being the UK air raid siren, and that will be close. It is a two tone siren that raises and falls in pitch, but they do not have the effects caused by space, there are some Doppler effects from sirens further away, and the whole effect is more mournful than you can imagine, stood in the streets very late at night with this siren wailing from our local town hall, the echos from the town and village halls in surrounding areas..... and other small groups of people stood in silence apart from the wailing of the sirens.
there were airaid sirens and poppy sirens and i dont no what els