0
It depends on where you are in the world. In the US, most ambulances sirens have 2 or 3 settings....a long, slowly ascending and descending Whooo sound, a short rapidly ascending and descending warble tone, and sometimes a 3rd, higher, louder, phazer sound (my favorite to get attention of complacent drivers). Rarely, US rigs will have a European, up/down, British, DA/da/DA/da/DA tone. We have 1 rig at our department with the rare European setting. I love to use that setting through intersections here in the US just to mess with people, because most Americans have never heard that tone, except in movies. Ambulances in the US also have either a genuine air powered horn (awesome), and/or an electronic simulated air horn sound (lame). If you pay attention, before long you will able to tell the difference between police, ambulance, fire engines, and personally owned emergency response sirens just by the subtle sounds of each siren. The loudest, best siren is the air powered siren on the Fire Engines. They are controlled by a foot button located on the floor of both the driver and passenger/officer seat of the engine, an air pump, and a big, loud, steel speaker horn. They are easily the loudest siren available. Some police cars in the US have a "Rumbler Siren" that bottoms out at a subsonic level to send shock waves into the ground and surrounding areas, so that even if you have a crazy loud stereo cranked up in your car, you will feel the police siren in your bones....pretty cool. Ambulance sirens are usually between 100 and 200 watts of powered sound, and about half of the drivers on the road are completely oblivious to both lights and sirens until you are really close. When you see emergency lights behind you with a siren in America, pull to the RIGHT and stop. They will always pass you on the left in the US. If it a cop, you will notice blue lights. It is very rare for any other emergency vehicles to employ blue lights in their ensemble...and usually illegal. If an unmarked police car attempts to pull you over, call 911 and verify the identity of the unmarked car before pulling over, or drive to the local PD if it is close. Although illegal, it is not hard hard to obtain emergency lights in the US, and is a tool used by criminals to pull over victims. Rare, but it happens.
What else can I help you with?
What is the sound or pitch when an ambulance goes by?
This is the doppler effect. If an ambulance is driving towards Jon, the sound waves are tightly stacked in front of the ambulance and are heard by Jon at a high frequency (high pitch). But behind the ambulance the sound waves are lagging because the ambulance is driving away from they sound waves (they are moving in the opposite direction) thus if Jon was standing behind the ambulance the frequency heard would be low (low pitch). The actual sound an ambulance makes is actually obnoxious, and if 100 of them drive by someone's apartment each day, it will make their head hurt and they will often think about why ambulances are so annoying.
An ambulance siren speeds away from you. what happens to the pitch of the sound?
As the ambulance moves away from you, the pitch of the sound will decrease. This is because the sound waves get stretched out due to the Doppler effect, causing the frequency of the sound waves to decrease as the source moves away.
Noises that begin with the letter A?
The sound of an accordion is a recognizable sound. An ambulance siren is a recognizable noise.
What sound has a longer wavelength a motorcycle o ambulance siren?
Motorcycle
Ambulance vowel or consonant?
Ambulance starts with a and ends in e. It's a noun with 5 consonants, 4 vowels.
What is the silent letter in the word ambulance?
The CE make the S sound but are silent
Why does the siren from an ambulance that is approaching you seems louder?
Echoing of the sound off other buildings around.should be it.
Why in ambulance the ambulance word written in opposite?
When an ambulance it traveling through traffic and is in a hurry. it may sound its siren. this will cause the driver to looking the rear vision mirror. now He will see the word Ambulance backwards because that is how you see things in reflection, so by writing it backwards the driver will see the word ambulance properly and react more quickly to the situation. This is why some ambulances have this.
What is an apparent in frequency of a sound source that moves relative to an observer?
The Doppler Effect. It's a change in frequency cause by the motion of the sound source, the motion of the listener, or both. As a source of sound approaches, observers hear a higher frequency. When the sound source moves away, observers hear a lower frequency. This effect was discovered by an Austrian scientist named Christian Doppler. Example: An ambulance siren. As the ambulance approaches a stationary observer, the frequency seems to increase. As the ambulance moves farther away, the loudness of the siren seems to decrease.
After an approaching ambulance passes a stationary observer what does the frequency of the sound of the siren heard by the observer appear to do?
The frequency of the sound of the siren appears to decrease as the ambulance moves away from the observer. This is due to the Doppler effect, which causes a shift in frequency as the source of the sound moves relative to the observer.
The velocity of sound in air is 343 ms An ambulance is traveling east at 64.9 ms Behind it there is a car traveling along the same direction at 29.8 ms The ambulance driver hears his siren at a?
afrequency of the same as siren frequency as ambulance is the source and the observer this is not Doppler effect problem
Is ambulance a short a sound word?
Yes. The A has the short A spund as in am and dam.
