Handpans are one of the most potent instruments when it comes to sound healing as they possess a great resonance and through their convex, round design, their sounds emanate in all directions, filling the whole room with vibration and resonance. Handpans and steeldrums are one of the few instruments where each musical note is tuned into a 1:2:3 frequency ratio, meaning there are three frequencies in each note anytime it is played. Most other instruments only possess two frequencies in each note. The three frequencies of the handpan are a fundamental tone, an octave harmonic and a compound fifth harmonic. The second frequency (the octave) is exactly half the size of the first (fundamental), and the third frequency (the compound fifth) is one third the size of the first (fundamental).