Noise __ Headphones, Sound-Blocking Technology

This page is the CodyCross answer for the clue below from African grasslands, Group 1547, Puzzle 1 (Olduvai Gorge).

Question is: Noise __ Headphones, Sound-Blocking Technology

and the answer is: CANCELING

Word Meaning:

CANCELING — present participle and gerund of cancel

Definitions from Wiktionary.