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Explain what happens to the sound in the following situations. a) A trumpet is an open...

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supersmartpants | Salutatorian

Posted May 28, 2013 at 4:28 AM via web

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Explain what happens to the sound in the following situations.

a) A trumpet is an open air column and is tuned inside a warm building. Later it is played outside on a very cold day. What happens to the sound produced by the trumpet? Explain why this happens.

b) What happens to the frequency of sound produced by a cylinder when filled with water as the water rises? Explain

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pramodpandey | College Teacher | Valedictorian

Posted May 28, 2013 at 5:24 AM (Answer #1)

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Sound wave travels faster through warm air than through cold air.   This is because the molecules of air are moving faster and the vibrations of the sound wave can therefore be transmitted faster.We For each degree rise in temperature above 0 degrees C, the speed of sound in air increases by 0.6 meters per second.

This means that when sound travels from hot air to cold air or from cold air to hot air it will refract (bent).The pitch of the note had gone down.
Thus pitch inside warm room will higher than out side the room i.e in cold  field.

b. Frequency of the sound wave increases as height of the water level rises in cylider.

 

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