The following formula is used to calculate the speed or velocity of a wave. Using a data logger and microphones to measure the speed of sound For example two microphones are 34 m apart. 1 Where c speed of sound K bulk modulus or stiffness coefficient r density.
A handy trick if you dont have a calculator to hand eg youre driving is to use the Fibonacci sequence 1 1 2 3 5 8.
C g x R x T M c the speed of sound in an ideal gas R the molar gas constant set at approximately 83135 J g Adiabatic index 14 for air T absolute temperature M the gas molar mass dry air is 00289645 kgmol When you are calculating the speed of sound in air you can simplify the formula to. Sound travels slowest in gases such as air. The ratio of the aircrafts speed to the speed of sound affects the forces on the aircraft. Enter your air temp and choose your units.