Out of the following, speed of sound is maximum in Aluminium.
Speed of sound in Aluminium at 25 deg Celsius is around 6420 m/s.
The matter or substance through which sound is transmitted is called a medium. It can be solid, liquid or gas.
Sound is a mechanical wave and needs a material medium for its propagation. It cannot travel through a vacuum.
Sound travels at different speeds depending on what it is travelling through.
Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.
Temperature also affects the speed of sound.
For Example, at 0º Celcius, sound travels through air at 331 meters per second, but, at 20ºC, room temperature, sound travels at 343 meters per second