The sounds you hear in this MP3 file were created by playing back time series of induced magnetic field measured from the University of Maryland Sodium Taylor-Couette experiment.
The data comes from an array of 16 Hall effect sensors arranged axially beside the experiment (please refer to page 5 and page 6 of the associated PDF slideshow).

The signals from the 16 sensors are panned across the stereo sound field in a way that's mapped to their physical position, so the the sensor at one end of the experiment is fully in the left channel, and the sensor on the other end fully in the right, the rest in between.

As time goes on, the strong axisymmetric magnetic field applied by the large magnets is increased. The growth and suppression of turbulence and the onset of new oscillating modes of magnetic field can be heard. These new magnetic field fluctuations are associated with new fluid motions in the fluid (see magnetic field and velocity spectrograms on page 10)

This data comes from the same experimental run as the black curve of magnetic field standard deviation on page 7.