all you have to do is stop the car and get out of the car and listen to the police siren
Almost every emergency vehicle is equipped with a siren.
A Siren....but the different tones of a siren are Wail, Yelp, Hi-Lo, Hyper Yelp, and the Air Horn. Loudness of a siren is between 110-130 db
Lights, and Siren.
a loud siren
the inventor of the police siren or the inventor of the noisemaker :)
fire engine; police vehicle; ambulance
An engine. A radio. A siren. A telephone.
A police car, a fire truck, some buildings, and more
Lights are a more effective warning than a siren. Lights are silent and a siren can provide warning to suspects when the police would like to catch them.
Quickly BUT SAFELY move to out of the way.If you cannot do so immediately,DO NOT PANIC do it when you can.
The Doppler effect
a police siren!!
The Doppler effect.
No. Ambulances and firefighting vehicles get precedence.
Ambulance. Police cruisers and vans. The local school in the case of a fire.
FreakyLinks - 2000 Subject Police Siren 1-12 was released on: Finland: 29 May 2001 USA: 8 June 2001
The wavelengths of the sound are compressed, making them shorter, and thus the frequency (and the pitch) higher. So the person in the oncoming car hears the siren operating at a higher pitch than the ambulance driver hears the same siren. This phenomenon is known as the Doppler effect.
So that when the police are trying to catch a speeder or a rushing to a crime scene, people who are driving know to make way for the police so they can get there as fast as possible.