Farmers are often exposed to loud noises, studies have shown that they often deal with noises of 89 dB’s for eight hours a day. There has not been an extensive study that looks at the noise effects of working in a pig barn. Studies of pig vocalization have tied it to stress. When pigs are making noise they are not comfortable and there bodies shift there duties from normal activities like productive growth and reproduction to trying to reduce stress. This study sets out to document noise levels in hog barns and to see if their is a connection between noise and reproduction of the sows. 18 group housed barns and 18 crated barns were used in the study. Each barn had a db recorder hung from the ceiling to record noise levels, and historical reproductive statistics were provided by the barns. Swine barns were found to reach levels of uncomfortable noise at least some point in the day and this has an effect on reproduction and worker safety. Wearing hearing protection is one way to help producers avoid risk such as hearing loss. Environmental design of barns and management practices are suggested as one way to reduce the noises made by the sows