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Show G6 TheSalt Lake Tribune SPACE Thursday, November 22, 2001 Acoustic Onslaughtiin Space Let's Talk... Astronauts deal with nonstop noise on spacestation Nights and Weekends! ‘THE ASSOCIATED PRESS of the National Aeronautics and Space Administration for worldly clamor. Here's the shrill reality: The fans and pumps are so loud up on the international spacesta- tion that astronauts who spent a month* nearly six months on board consider noise one of the top Plus 1000 habitability issues. “Tt’s always there,” says NASAastronaut Jim Voss. “It’s sort of like being in tel atae mL cuale ae od maybe factory,” he adds. “Not a factory where they're stampingsteel, but a normal production facility where there’s constant noise in the background all the time from machinery s 099 for only equipmentand circulatingair. Russia's half of the space station the noisier half —has long been a concern. The two Russian core modules exceeded the safety limits around Earth, removed from for only Says, were fans for cooling BY!MARCIA DUNN CAPE CANAVERAL,Fla. The image is one of quiet serenity: Astronauts on a space station gliding effortlessly 6 1099 orbit after years of delay, space station officials accepted the noisy Russian modules with that’s running.” The biggest offenders, Voss the understanding that muf- flers would be added later. Mufflers have been added and more are on the way. But the overall noise level remains “pretty high,” “The crew has to repeat what they say quite often, and noise even before they were launched in 1998 and 2000. Because they were patterned after existing Mir designs, the modules had higher noise limits than U.S.standards. Bythe time NASAgotall the acoustic data on Russia’s Mir space station, it was too late. The agreementwas struck, and NASAwas stuck. “We were in a dilemma, and it was very difficult to convince anyoneat the time that we were going to have these kinds of problems,” recalls Jerry Goodman, a NASAengineer whogot involved in the space station acoustics three or four years ago. “Wegotinto a difficult political situation.” Anxiousto get something in there’s a possibility for mistakes,” Goodman says. “If you don’t hear the numbers correctly, you put in the wrong thing, it could have bad repercussions.” The problem is further ex- asperated by the mix ofnationalities on board. Russia plans to replace its fans with quieter units, but that’sstill 14 totwo years away, says NASA’s space station program manager, TommyHolloway. The problemis financial, not technical, he stresses. In the meantime, engineers are working on other solutions, like isolating and insulating noisy equipment. Need Extra Cash a month* for the Holidays? PLUS UNLIMITED Te Lahae-m WcteLcclae mal heed says. 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