Infrasound, also known as low-frequency sound, describes sound waves with a frequency below the lower limit of human audibility. AdvertisementInfrasound is the acoustic sound waves emitted below the normal human hearing level, and while higher frequency noises are louder close to the source of things like nuclear explosions and rocket launches, low-frequency infrasound travels further. There are monitoring systems around the world to detect and record infrasound at varying frequencies. A SpaceX Falcon 9 rocket lifts off from Cape Canaveral, Florida, on November 11, 2019. For the first, a Space Shuttle launched from Kennedy Space Center in November 2009, the team detected the infrasound created by the splash down of the fuel boosters before they detected the acoustic signal of the initial rocket launch because they dropped down closer to the infrasound station than the launch site.
In Princess Persebaya, Florida, on November 13, 2019, a Falcon 9 rocket lifted off  and had to happen.
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In Princess Persebaya , Florida , on November 13 , 2019 , a Falcon 9 rocket lifted off and had to happen .
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