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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.
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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.
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
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.
Is ambulance a short a sound word?
Yes. The A has the short A spund as in am and dam.
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.
The ambulance is moving toward you and your sound technology measures the pitch at 645 hertz. The speed of the ambulance is therefore ______ m/s.?
*this is the full question not the answer* Suppose you’re standing on a sidewalk and down the street is an ambulance parked; it’s siren is a 600 Hz sound like it louder, Quieter, louder, quieter, etc. By now, you should understand that if the ambulance drivers toward you the pitch will be higher than 600 Hz. BUT HOW MUCH HIGHER? The amount is directly proportional to speed!(this means waves can be used as a speedometer!) here’s a fact: if the ambulance approached you at 8.5 m/s, the pitch would raise by 15 Hz: you would here 615 Hz instead of 600. But if the ambulance came at you twice as fast— 8.5+8.5=17.0 m/s — The pitch would raise by 30 Hz, you were here at 630 Hz sound. Question: do use the facts given above to answer this:The ambulance is moving toward you and your sound technology measures the pitch at 645 hertz. The speed of the ambulance is therefore ______ m/s.
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
What sound does an ambulance make?
Nee Naw, quite like the sound of a dozen screaming children being dragged across a xylophone.
What was the song Kathy Bates sang to the dying woman in back of the ambulance about going home to God?
According to IMDB under title "Sound track" there is no film in which Bates sings at the back of an Ambulance. You may have to wrong actress.
