Losing Our Hearing

* self inflicted: 자초한, 스스로 불러온
ex> He is being treated for a self-inflected gunshot wound.

* hygiene: 위생

* cacophony [kə^|kɑ:fəni]: 불협화음 (a loud, unpleasant mixture of sounds)
ex> All around was bubbling a cacophony of voices.

* auditory: 청각의