Speed of sound:
Speed of sound is different in different mediums. In a
medium, the speed of sound basically depends upon elasticity and density of
medium.
Speed of sound is maximum in solids and minimum in gases.
When sound enters from one medium to another medium, its
speed and wavelength changes but frequency remains unchanged.
In a medium, the speed of sound is independent of frequency.
Effect of pressure on
speed of sound: The speed of sound is independent of pressure i.e. speed
remains unchanged by the increase or decrease of pressure.
Speed of sound in different mediums
|
Medium
|
Speed
of sound (In m/s)
|
|
Carbondioxide
|
260
|
|
Air (0˚C)
|
332
|
|
Air (20˚C)
|
343
|
|
Steam (at 100˚C)
|
405
|
|
Helium
|
965
|
|
Alcohal
|
1213
|
|
Hydrogen
|
1269
|
|
Mercury
|
1450
|
|
Water (20˚C)
|
1482
|
|
Sea water
|
1533
|
|
Copper
|
3560
|
|
Iron
|
5130
|
|
Glass
|
5640
|
|
Granite
|
6000
|
|
Aluminum
|
6420
|
Effect of temperature
on speed of sound:
