Environmental noise experiment (DTO 71-22)

Only general conclusions can be reached of the effect of Skylab simulation chamber noise on the crewmen. Two crewmen experienced a small hearing decrement in-chamber, but there was no pattern as to the ear and frequency affected. Temporary hearing threshold shifts were observed in all three crewmen postchamber. These postchamber threshold shifts were perhaps the most significant finding of the study. However, no lasting detrimental effects on the crew's hearing were found.