Sound energy travels through 'Medium'

The Music Telegraph | Text 2018/11/28 [14:48]

Sound energy travels through 'Medium'

The Music Telegraph| 입력 : 2018/11/28 [14:48]

 

 

 

Medium

 

Sound energy moves thru the medium by molecular displacement.

 

Medium can be ‘Solid’, ‘Liquid’, and ‘Gas’.

 

▲ © The Music Telegraph



 

 

 


[side trip] There was an artist who conducted ‘Under Water’ Recording (Paul Winter Consort)

https://youtu.be/iZqDonJ60fI

 

 

 

It is the material’s molecular density which determines how well it can transmit sound energy.

 

 

Medium density determines:

 

a) Propagation Efficiency (distance)

- More density => Move greater distance

Less loss in the transfer of energy from one molecular to another 

 

b) Velocity (v)

- Speed of Sound

- Higher density => faster

 

ex1)

Air = 1127 Feet per second at sea level at 72 °F (22 °C)

For United States, 1130 Feet/sec (344 m/sec)

 

ex2)

Water = 4000 Feet/sec

Sound is much faster in water than in air

- That’s why sound weird under water

 

ex3)

Steel = 16,000 Feet/sec

 

ex4)

Electron = 186,000 Miles/sec

 

 

e.g.) 

▲ © The Music Telegraph

 

 

 

 

 

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