About 10 years ago, when the WMAP data on the cosmic microwave background (CMB) became available, I did a Mathematica calculation to produce “the sound of the Big Bang”.
I have decided to do the same thing with the new data from the ESA’s Planck Mission analysis of the CMB, which analyzes the temperature variations of the cosmic microwave background into angular frequency components or multipoles. The new frequency spectrum goes to much higher frequencies than did the WMAP analysis, and therefore offers a more “high-fidelity” rendition of the Sound of the Big Bang.
BBSnd100.wav (sound duration 100 seconds)
Via University of Washington for a full description of how the audio conversion was constructed.