Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, USA.
Department of Physics, Rollins College, Winter Park, Florida 32789, USA
JASA Express Lett. 2023 Feb;3(2):023601. doi: 10.1121/10.0016878.
To improve understanding of super heavy-lift rocket acoustics, this letter documents initial findings from noise measurements during liftoff of the Space Launch System's Artemis-I mission. Overall sound pressure levels, waveform characteristics, and spectra are described at distances ranging from 1.5 to 5.2 km. Significant results include: (a) the solid rocket boosters' ignition overpressure is particularly intense in the direction of the pad flame trench exit; (b) post-liftoff maximum overall levels range from 127 to 136 dB, greater than pre-launch predictions; and (c) the average maximum one-third-octave spectral peak occurred at 20 Hz, causing significant deviation between flat and A-weighted levels.
为了增进对超重火箭声学的理解，本函件记录了太空发射系统“阿尔忒弥斯 1 号”任务发射期间的噪声测量初步结果。在 1.5 至 5.2 公里的距离范围内，描述了整体声压级、波形特征和频谱。主要结果包括：（a）固体火箭助推器点火超压在靠近发射台火焰沟出口的方向特别强烈；（b）发射后最大整体水平高于发射前预测值，范围为 127 至 136 分贝；（c）平均最大三分之一倍频程频谱峰值出现在 20 赫兹，导致平坦和 A 加权水平之间出现显著偏差。
