Imagine the snaps, crackles and pops of a crispy cereal or the sound of a potato chip bag being crumpled. Each time you move your lower limbs, those are the sounds your knees make on the inside, even without you realizing it.
원문출처 : http://www.cnn.com/2017/11/02/health/knee-injury-sounds-teching/index.html
원문출처 : http://www.cnn.com/2017/11/02/health/knee-injury-sounds-teching/index.html