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marketrent OP t1_j98r8mb wrote

Excerpt from the linked release^1 by AIP Publishing about noise measurements taken at five stations located 1.5 km to 5.2 km from the launch pad:^2

>When the Artemis 1 mission was launched by NASA’s Space Launch System, SLS, in November, it became the world’s most powerful rocket, exceeding the thrust of the previous record holder, Saturn 5, by 13%.

>With liftoff came a loud roar heard miles away.

>In JASA Express Letters, published on behalf of the Acoustical Society of America by AIP Publishing, researchers from Brigham Young University and Rollins College in Florida reported noise measurements during the launch at different locations around Kennedy Space Center.

>The data collected can be used to validate existing noise prediction models, which are needed to protect equipment as well as the surrounding environment and community.

>These data will be useful as more powerful lift vehicles, including the SLS series, are developed.


>“We hope these early results will help prevent the spread of possible misinformation, as happened with the Saturn 5,” author Kent Gee said.

>“Numerous websites and discussion forums suggested sound levels that were far too high, with inaccurate reports of the Saturn 5’s sound waves melting concrete and causing grass fires.”

>A characteristic feature of rocket launches is a crackling sound from shock waves.

>These shocks represent instantaneous sound pressure increases that are much louder than crackling noises encountered in everyday life.

>Author Whitney Coyle said, “We found the Artemis-I noise level at 5 km had a crackling quality about 40 million times greater than a bowl of Rice Krispies.”

^1 The Roar and Crackle of Artemis 1, AIP Publishing, 14 Feb. 2023,

^2 Kent L. Gee, et al. Space Launch System acoustics: Far-field noise measurements of the Artemis-I launch. JASA Express Letters 3, 023601 (2023);