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Rev. Notes > IGCSE > Sound
 
 
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Nature of sound waves

Experiment: Sound can not travel through vacuum

Production of sound
Characteristics of sound

Medium to transmit sound waves

Speed of sound in different media

Echo

Audible frequency range

 

Experiment: Sound can not travel through vacuum

An electric bell is suspended from wires passing through the cork in a bell jar with stands on the plate of an air pump. The bell is set ringing and the air is pumped out of the jar. As the air is removed, the sound becomes fainter until it may become inaudible althoug the bell can still be seen ringing. As the air is readmitted, the sound becomes louder once again. Three things are necessary for the production, propagation, and observing the sound.

1- A vibrating body

2- Some material medium like air and water

3- Receiver like ear

 
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muaskerr Said :
Is goopd
 
  19/05/15 04:42 PM
   
Deka Anggawira Said :
Good Job, KEEP IMPROVE AND ADD THE POSITIVE Information
 
  17/02/13 01:30 PM
 

 

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