# Speed of sound is maximum in which medium?

• The speed of sound is the distance that any sound travels per unit of time.
• The molecules in the medium are tightly packed when the medium is dense, that implies the sound travels faster.
• Therefore, as the medium density increases, the speed of sound increases.

## Solids

• In solids, the molecules are closer to one another than in liquids and in liquids than in gases.
• This closeness due to density implies that very easily they will collide.

## Liquid

• A liquid’s density is greater than the density of a gas.
• The gaps between molecules are also greater in liquids than in solids but less than in gases.
• The speed of sound in liquids is therefore found between the speed of sound in solids and gases.

## Gases

• Density is very uniform irrespective of the nature of gas because gases expand to occupy the given space.

### The velocity of sound in various medium

We may assume, from the above discussion, the sound velocity varies as shown below in the various mediums.

• Sound moves quickly in solids as compared to air, fluid or vacuum.
• Sound moves at a higher rate via denser media.
• The density of the solid is greater than the densities of air, liquid & vacuum.
• Sound velocity in the medium of Vacuum < medium of gas < medium of liquid < medium solid.