Launch and Recovery Noise* Noise impacts from SPS operations will come from the sound level generated by the Heavy Lift Launch Vehicle (HLLV) during ascent and from sonic booms created during ascent and reentry. Figure 2.2 from Ref. 2.8.2 shows the sound pressure levels of the HLLV, as compared to the Saturn V. The 130dB sound pressure contour is 5000 m from the launch pad for the HLLV, as compared to 2225 m for the Saturn V. Using a Cape Canaveral, Fla., launch site, Ref. 2.8.2 estimates that the city of Titusville would receive sound pressures of 128.9 dB and that other nearby cities of Cape Canaveral and Cocoa Beach would incur sound pressure levels of 125-130 dB. To assess the effects of these levels on the public, two conversion steps are necessary. First, the absolute sound pressure must be converted to an A-weighted level to account for the sensitivity of the human ear to different frequencies. Second, the short-term sound pressure levels must be integrated THE HLLV HAS HIGHER NOISE LEVELS THAN THE SATURN V Fig. 2.2. Variation of Overall Sound Pressure Level *with Distance from Launch Site
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