The speed of sound is directly proportional to the temperature of the medium through which it travels/Book%3A_University_Physics_I_-Mechanics_Sound_Oscillations_and_Waves(OpenStax)/17%3A_Sound/17.03%3A_Speed_of_Sound). As the temperature increases, the speed of sound increases, and as the temperature decreases, the speed of sound decreases/Book%3A_University_Physics_I_-Mechanics_Sound_Oscillations_and_Waves(OpenStax)/17%3A_Sound/17.03%3A_Speed_of_Sound). This is because molecules at higher temperatures have more energy, which allows them to vibrate faster and transfer energy more quickly. The relationship between temperature and the speed of sound is given by the equation v = 331 m/s √(T/273 K), where v is the speed of sound and T is the temperature in kelvins/Book%3A_University_Physics_I_-Mechanics_Sound_Oscillations_and_Waves(OpenStax)/17%3A_Sound/17.03%3A_Speed_of_Sound). For example, at 20°C (293 K), the speed of sound in air is about 343 m/s, while at 0°C (273 K), the speed of sound in air is about 331 m/s.