Kellison Makayle S, Gee Kent L
Department of Physics, Rollins College, Winter Park, Florida 32789, USA.
Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602,
JASA Express Lett. 2023 Nov 1;3(11). doi: 10.1121/10.0022538.
To improve acoustical models of super heavy-lift launch vehicles, this Letter reports Space Launch System's (SLS's) overall sound power level (OAPWL) and compares it to NASA's past lunar rocket, the Saturn V. Measurements made 1.4-1.8 km from the launchpad indicate that SLS produced an OAPWL of 202.4 (±0.5) dB re 1 pW and acoustic efficiency of about 0.33%. Adjustment of a static-fire sound power spectrum for launch conditions implies Saturn V was at least 2 dB louder than SLS with approximately twice the acoustic efficiency.
为改进超重型运载火箭的声学模型，本信函报告了太空发射系统（SLS）的总声功率级（OAPWL），并将其与美国国家航空航天局（NASA）过去的月球火箭土星五号进行了比较。在距离发射台1.4 - 1.8千米处进行的测量表明，SLS产生的总声功率级为202.4（±0.5）分贝（相对于1皮瓦），声学效率约为0.33%。根据发射条件对静态点火声功率谱进行调整后发现，土星五号的声音至少比SLS高2分贝，声学效率约为其两倍。
