The speed of sound in dry air is affected by temperature.
Temperature range: -100 to +80°C
|
Temperature
|
Speed of Sound
|
|
-100°C
|
263.5 m/s
|
|
0°C
|
331.5 m/s
|
|
80°C
|
376.7 m/s
|
speed of sound in meters per second =
= (-0.000656 * ((temperature in °C)^2)) + (0.6115 * (temperature)) + 331.6
speed of sound in km per hour =
= (speed of sound in meters per second) * 3.6
where:
• 3.6 = 60 * 60 / 1000
speed of sound in miles per hour =
= (speed of sound in km per hour) * 0.6214
= (speed of sound in meters per second) * 2.237
