Able to hear every sound on Earth and focus on individual conversations

The bio-android's thoughts then turned to the inhabitants of Earth, and he concentrated briefly. It was difficult to get the hang of Namekian super-hearing at first. Physical sound waves only carry so far; the Namekian ability allowed for something more like telepathy. He wasn't sure if any Namekian had ever used the sense to such a degree, but he was special after all. He doubted any of them had ever regenerated from a single nucleus either. But by focusing, Cell was able to hear any sounds on Earth...at least, any sounds that a human being was listening to.

The flood of noise was initially deafening. Billions of simultaneous conversations, screechings, chimes, roars...it all rushed into Cell's consciousness simultaneously, causing him to wince for a split second. But he soon gained more control, carefully picking apart the individual threads of conversation and simply listening. It went back and forth...relaxing one moment, deafening the next.

"But mommy, I have to save my game first!"

"You'll take the trash out right this instant, or I'll throw that TV out and you'll never see it again!"

"But Moooom..."

Cell had no desire to listen to a mother lecturing her son. He began scanning for a handful of key words, something that might pique his interest. The more he focused, the more he found.

- Bringer of Death Chapter 54