Hygienic evaluation of the acoustic conditions inside the habitable compartments of the Russian segment of the International Space Station during increment one

: Acoustic measurements made in the ISS RS as a part of the ground assembly testing and during ISS increment-I showed that noise at the RS workplaces was 1.3 to 4.8 dBA higher than during the assembly testing and exceeded the MIR noise values by 2.4 to 5.0 dBA. Comparison of the MIR and ISS RS acoustic environment revealed that most often inadmissible noise was characteristic of the same locations, i.e close to the air conditioner and system Vozdukh. Noise measurements in the Service Module crew quarters did not diverge significantly from results of the ground testing, and MIR noise monitoring. These data verified the necessity for spacecraft designers to predict noise levels and select noise-suppressing methods already on the phase of research and development.