The normal air raid signal is typically a 3 to 5-minute wavering, rising and falling, or "wail" tone. This signal indicates an imminent attack or severe emergency requiring immediate shelter. It is different from a steady alert tone used for weather or a steady "all-clear" signal.
Air Raid Siren Characteristics:
Signal Type: A wavering, undulating, or "wailing" tone (rising and falling).
Duration: Usually lasts for 3 to 5 minutes.
Meaning: An attack or hostile act is imminent or in progress.
Action Required: Seek shelter immediately and tune into local media for information.
"All Clear" Signal: Often a solid, steady non-wavering tone, indicating the threat has passed.
Note: Siren signals can vary by region or country; always follow local emergency management guideline