Temperature-Dependent Velocity
The velocity of sound is temperature dependent. The approximate formula for calculating velocity is
The Effect of Altitude on the Velocity of Sound in Air
The theoretical expression for the speed of sound, c, in an ideal gas (air, for example) is
It can be seen that the velocity is dependent only on the type of gas and the temperature and is independent of changes in pressure. This is true because both P and ρ decrease with increasing altitude and the net effect is that atmospheric pressure has only a very slight effect on sound velocity. Therefore the speed of sound at the top of a mountain would be the same as at the bottom of the mountain if the temperature is the same at both locations.
Related posts:
Electric Motor Manual – SELECTION AND APPLICATION – Starting and running induction motor...
LOSSES AND EFFICIENCY OF DC MACHINES
Troubleshooting AC motors and starters:Motor failures and methods to extend its life
Manual starters:Troubleshooting
AUDIO AND VIDEO SYSTEMS - NOISE REDUCTION
Conduit and Trunking Systems:Overview of Conduit Types
THE DOUBLE CAGE BEHAVES LIKE A DEEP BAR CAGE
Functions of Motor Control:Push Buttons
INTRODUCTION TO INDUSTRIAL CONTROL
Acoustic Environment:Typical Wavelengths
INDUSTRIAL CONTROL SYSTEM SIMULATION ROUTINES:SOFTWARE AND SIMULATOR
MAINTENANCE OF MOTORS:FAILURES IN THREE-PHASE STATOR WINDINGS AND PREDICTIVE MAINTENANCE
Timed Starting for Three Motors ( Circuit #2)
Acoustic Environment:Effect of a Space Heater on Flutter Echo