Do sonic booms still happen?

For the aircraft, the shock wave is what causes the loud, thundering sonic boom. It's happening all the time, but for people on the ground, they only hear it once when the wake passes over them. Occasionally a double bang is heard, because two wakes are created, one by the aircraft nose and the other by the tail.



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The power, or volume, of the shock wave depends on the quantity of air that is being accelerated, and thus the size and shape of the aircraft. As the aircraft increases speed the shock cone gets tighter around the craft and becomes weaker to the point that at very high speeds and altitudes no boom is heard.

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Current rules prohibit commercial airplanes from flying at supersonic speeds over land because of the noise levels associated with sonic booms and the negative impacts to humans and animals.

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And the jet pilots don't feel a sonic boom from the cockpit, just as passengers on a boat don't feel the effects of the wake behind them, she added.

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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For example, the speed of sound at 30,000 feet is about 670 miles per hour, but an aircraft must travel at least 750 miles per hour (Mach 1.12, where Mach 1 equals the speed of sound) for a boom to be heard on the ground.

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Spike Aerospace, founded in 2013 Max Kachoria of NASA, built an 18-passenger supersonic jet with low-sonic boom, fuel efficiency, speeds up to 1,100 mph, and flight times slashed in half. Their current model is the S-512 which can get passengers to cities in a moment's notice: NYC to London: 3 hours.

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A sonic boom is a loud noise that people on the ground can hear when an aircraft, for example, breaks the sound barrier by traveling faster than the speed of sound. Supersonic flight is banned over land in the US without special government authorization because of the inconvenient noises and tremors it can produce.

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The FAA's existing restrictions can be found at 14 CFR Part 91.817. In essence, that regulation prohibits anyone from operating a civil aircraft at a true flight Mach number greater than 1 over land in the United States and from a certain distance off shore where a boom could reach U.S. shores.

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It's performative and the pilot can't hear you anyway! Whether you love to clap or not, know that the pilots likely can't hear you. This is due to the soundproof-nature of the cockpit.

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