Converting Astronomical Spectra into Sounds: a Tool for Teaching and Outreach? ... In this paper, I present a new way of presenting spectra to the public: convert the electromagnetic spectra into sound spectra and let people listen to them. ... In these cases, the signals being converted to sound are acoustic pressure oscillations: they really are sound waves, simply needing their frequencies to be shifted into the audible range. ... 2 HOW TO TURN SPECTRA INTO SOUNDS: STEP BY STEP GUIDE . ...