Speed of sound is maximum in air or
- speed of sound is maximum in humid air or dry air
- speed of sound is maximum in dry air or moist air
- speed of sound is maximum in air water vacuum
- speed of sound is maximum in air or steel
- speed of sound is maximum in air or solid
- speed of sound is maximum in air or metal wire
- speed of sound is maximum in air or vacuum
- speed of sound is maximum in air or water
