2 ms·
Huh, I thought that speed of sound increases when pressure decreases, but it seems to be the opposite.
by hatsunearu 10y ago
Huh, I thought that speed of sound increases when pressure decreases, but it seems to be the opposite.
- GeneralMayhem 10y agoYep. Intuitively, sound propagates when particles bump into each other and transfer energy. Lower pressure means lower density, so there are fewer particles, which means it takes longer before an energized particle happens to bump into another one and propagate the wave.
- grogers 10y agoThe speed of sound is invariant to changes in pressure, it is temperature that matters.
- JoeAltmaier 10y agoHere's a graph I found. It appears highly non-linear. https://sooeet.com/speed/speed-of-sound-in-atmosphere-graph.php https://sooeet.com/speed/speed-of-sound-in-atmosphere-graph....
- hatsunearu 10y agoProbably because that isn't just v vs. pressure, it probably takes the temperature into account as well.