system
Given the following post, respond as if you're commenting on Reddit:
human
How does sound move in plasma ?
gpt
In a non-magnetized plasma, sounds waves behave just like sound waves in a regular gas. They are just longitudinal, adiabatic compression waves of the mass density of the gas/plasma. And assuming an ideal gas, the speed of sound depends only on the type of gas and the temperature.

In a magnetized plasma, things get more complicated. You can have transverse (Alfven) waves or longitudinal (magnetosonic) waves. In both cases, the speed of sound depends on the magnetic field strength.