Noise is the likely answer to the riddle “what can pierce an ear without a hole.” It’s a classic wordplay clue: noise can “pierce” your ears metaphorically, without creating a physical hole.

Why that fits

The phrase “pierce an ear” is being used figuratively, not literally. In riddle form, the intended answer is usually something sharp or intense in sound, and “noise” is the most common match.

Other possible interpretations

  • Noise : the standard riddle answer.
  • Music : sometimes guessed, but it’s less precise than noise in this wording.
  • Needle : it can pierce, but it does not fit the “without a hole” ear-specific wordplay as well.

TL;DR: Noise.