What is another word for the sound barrier?
Pronunciation: [ðə sˈa͡ʊnd bˈaɹɪə] (IPA) 
The term "the sound barrier" refers to the physical phenomenon that occurs when an object moves through the air and begins to approach the speed of sound. This causes a rapid increase in air pressure, which can create a shock wave that produces a loud, explosive noise. Although "the sound barrier" is commonly used to describe this occurrence, there are other phrases that can be used to convey the same meaning. Some alternatives might include "sonic barrier," "supersonic boom," "mach wave," or "sonic boom." Each of these terms describes the same physical event and can be used interchangeably with "the sound barrier".
