siren

a loud noise made by a machine, especially to warn people of danger or to get their attention

silbato, sirena

• the sound of the siren

Collocations sound of a siren · emergency siren

• The sound of the ambulance's siren was getting louder.

  El sonido de la sirena de la ambulancia se estaba volviendo más fuerte.

a flashing light on a police car, ambulance, or fire engine that is used to warn other vehicles and pedestrians of an emergency situation

luces parpadeantes de emergencia

• the flashing lights on a police car

Collocations police siren · emergency vehicle siren

• The police car's sirens and flashing lights were visible from far away.

  Las sirenas y luces parpadeantes de la patrulla policial eran visibles desde lejos.