Answer:
Pitch
Step-by-step explanation:
Enrico has trouble differentiating between a tuba's sound and a piccolo's sound. Although a piccolo generates sound waves that are much briefer, quicker than a tuba, he has trouble tracking the variations in the pitch of such sounds.
For music, a note's pitch indicates the note's high or low. It is measured for physics in a Hertz unit. A note that vibrates at 261 Hz is induced by pulsing sound waves at 261 times per second.