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The raising and lowering of the whistle's pitch due to the alteration in the relative speed of the whistle as it goes by you, described by two terms that can be discovered by reading your homework assignment.

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Q: What happens to the sound of a train whistle as a train approaches and passes you why?
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What happens to the sound of a train whistle as the train approaches and then passes?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.Read more: http://wiki.answers.com/Why_is_the_pitch_of_a_train's_whistle_higher_as_the_train_approaches_and_loweras_it_moves_away#ixzz1DToTuS3j


Occurs when a sound passes an observer?

That would be the Doppler shift of the sounds frequency as it approaches you and passes by.


Why is the pitch of a train's whistle higher as the train approaches and loweras it moves away?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.


What is the Doppler effect and is it useful?

It is the effect that happens when waves like sound are moving in relation to another object. In the classic train whistle example, The whistle suddenly drops in pitch as it passes you and starts to move away from you. This is because the sound waves now are stretched out, giving them a lower pitch. It is useful. Doppler radar used in weather forecasting is one example.


What happens to a sound source as it approaches?

It appears to have a higher frequency due to the Doppler Effect.

Related questions

What happens to sound of a train whistle as a train approaches and passes you?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.


What happens to the sound of a train whistle as a train approaches and passes you?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.


What happens to the sound of a train whistle as the train approaches and then passes?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.Read more: http://wiki.answers.com/Why_is_the_pitch_of_a_train's_whistle_higher_as_the_train_approaches_and_loweras_it_moves_away#ixzz1DToTuS3j


What happens the sound of a train whistle as the train approaches and then passed you?

It gets louder and then gets quieter


A train passes by blowing its whistle As it passes the sound of the whistle is lower than it was on its way towards you This is due to?

a change in the sound's frequency caused by the motion of the sound's source


Occurs when a sound passes an observer?

That would be the Doppler shift of the sounds frequency as it approaches you and passes by.


Why is the pitch of a train's whistle higher as the train approaches and loweras it moves away?

This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.


What happens when a sound source passes by you?

it's frequency increases


What is the Doppler effect and is it useful?

It is the effect that happens when waves like sound are moving in relation to another object. In the classic train whistle example, The whistle suddenly drops in pitch as it passes you and starts to move away from you. This is because the sound waves now are stretched out, giving them a lower pitch. It is useful. Doppler radar used in weather forecasting is one example.


What happens to a sound source as it approaches?

It appears to have a higher frequency due to the Doppler Effect.


How do you spell a Whistle sound?

We all heard a whistle before, but when you are writing something and you want to type or write a whistle sound, it gets you thinking. If I were writing it i would put, WHEWWW, or, PHEWWWWWW. NO A whistle sound makes the sound Whistle


How do you write the sound a whistle makes?

The sound a whistle makes is often described as "whoo" or "wee" depending on the pitch and intensity of the sound.