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The sound barrier is formed by pressure waves building up on each other. Imagine a singer. If you have a second singer sing with them it sounds louder. Add more singers and the loudness goes up. This is because the sound waves are constructively interfering with each other or building up. The same happens with the sound barrier. The pressure wave built up has a very high intensity but, because all of the sound waves occupy the same space, the wave creates a very short, but loud "Boom."

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16y ago

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