[视频作者] eternalmummy
[视频时长] 5:0
[视频类型] 短片
http://shortfil.ms/film/20-hz-2015 Human hearing is capable of detecting sound waves between 20 and 20.000 Hz … merely a small fraction of the frequency spectrum. Most sounds around us go unnoticed. Director: Chris Keller Writer: Chris Keller Ca