Excellent question!

The energy is typically dispersed by hairs moving, muscles moving, eardrum moving, soft tissue deforming, the hearing system behind the ear drum, your eustachian tube, the movement of the ear pod against your outer ear, and the imperfect seal of the ear pod.

105 dB is probably the max sound pressure level at optimal seal.

Also, it's easy to verify, as resonance is literally the reason why violins, guitars and pianos have a ringing sound. Whereas regular sounds do not, because your ears don't have audible resonances (they do have resonances in other frequencies though, just as your eye sockets, lungs and other stuff).