Question

what are the factors affecting speed of sound?

Answer 1

the thing coming in its direction. air .density of air.and density of material in path of sound.

Answer 2

Air density affects it. Temperature, pressure,humidity and gas mixture can each affect thedensity. In liquid: The speed of sound is affected bydensity and viscosity. These in turn are affected bytemperature, pressure, composition and currents(as with wind).