From the CMB to Sound

Figure 10 : This montage shows the various steps in recreating the primordial sounds from the microwave background. Satellites produce a map of the microwave sky, which can be thought of as many waves of different wavelength all mixed together. Analysis of the patchiness generates a "sound spectrum" which, for the microwave sky, shows a fundamental and harmonic peaks. This is the sound spectrum which generated sound4.wav.