If you've heard a sonic boom recently, you probably remember it. The loud, explosion-like bang -- caused by a plane flying faster than the speed of sound -- can be startling, and even crack windows.
원문출처 : https://www.cnn.com/travel/article/x59-nasa-supersonic-plane-scn/index.html
원문출처 : https://www.cnn.com/travel/article/x59-nasa-supersonic-plane-scn/index.html