For nothing. Sirens are a thing of a later age and were then mostly used to indicate start or end of work on factory sites. In 1793, people were roused to whatever action by blowing a horn.
there are electromechanical sirens or there are sirens that have a combination of one or more loudspeakers (usually used for broadcasting voice messages). they also are either rotational sirens (horn rotates 360), or omni-directional sirens (points in all directions). See the related links below for examples.
No, tornado sirens are used to warn of approaching tornadoes or severe weather, while nuclear explosion sirens are used to warn of an imminent threat of a nuclear explosion or attack. Both sirens serve different purposes and are designed to alert people to take appropriate actions based on the specific threat.
sirens
Mythlogical Sirens were considered the daughters of the river god Achelous, fathered upon Terpsichore, Melpomene, Sterope, or Chthon. Sirens (noisemaker) were originally used as musical instruments, powering the pipes of organs.
They were used to warn of incoming bombing raids. The sirens could be heard over a wide area - and were more effective than (for example) making a radio broadcast.
Leeches were used back then.
Yes, they are but are called bomb sirens
No, they used only their voices to lure sailors to death.
Oh, to signal that they need to go somewhere fast.
Sirens are either Greek mythological monsters that lull unsuspecting victims by singing to them OR loud, screeching machines that are used to indicate the danger of a certain area.
In France, during the Revolution, in 1793.
the sirens