c ( x R x T / M) c the speed of sound in an ideal gas R the molar gas constant (set at approximately 8.313,5 J) Adiabatic index (1.4 for air) T absolute temperature M the gas molar mass (dry air is. Humidity has little effect on the speed of sound, nor does air pressure by itself. If you want to know the speed of sound in a gas such as air, use this unique formula. The speed varies depending on atmospheric conditions the most important factor is the temperature. In an ideal gas, intermolecular gaps are always taken to be very large, regardless of pressure.Ĭonsidering this, which factors do not affect the speed of sound? It has no effect at all in an ideal gas approximation, because pressure and density both contribute to sound velocity equally, and in an ideal gas the two effects cancel out. Similarly, what is the effect of pressure on the speed of sound in air? Air pressure has almost no effect on sound speed. These in turn are affected by temperature, pressure, composition and currents (as with wind). In liquid: The speed of sound is affected by density and viscosity. Temperature, pressure, humidity and gas mixture can each affect the density. Moreover, which factors affect the speed of sound?Īir density affects it. The speed of sound is also affected by other factors such as humidity and air pressure. The speed of sound in room temperature air is 346 meters per second. Since the molecules vibrate faster, sound waves can travel more quickly.
Molecules at higher temperatures have more energy, thus they can vibrate faster.
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