2025/10/01 by Makayle S. Kellison, M. J. Casiano, Kent L. Gee +2 · 1 voice
Engineering · Environmental Science · #Acoustic Wave Phenomena Research #Aerodynamics and Acoustics in Jet Flows #Wind and Air Flow Studies
paper · pdf · doi:10.1121/10.0039568
openalex publication_date 2025/10/01 · openalex created_date 2025/10/15 · openalex updated_date 2026/06/22
This Letter presents an analysis of near-field acoustic data collected on Space Launch System's Mobile Launcher tower during the Artemis I mission. Twelve pressure sensors located two and four effective nozzle diameters (De) from the vehicle centerline recorded maximum overall sound pressure levels ranging from ∼ 162 dB to more than 170 dB, originating ∼ 10 De downstream of the nozzle exit plane. Frequency-dependent characteristics are also discussed. The peak noise is radiated over a broader frequency range than in the far field. Low-frequency noise locations match other rockets, but high-frequency locations diverge, falling between prior measurements of undeflected and deflected plumes.