The sound level for a train horn averages over 100 decibels. To put that into context, when the US government released memos regarding the torture of prisoners at Guantanamo Bay, they included specific instructions that any “white noise/loud sounds” were not to exceed 79 decibels. According to OSHA at 100 dBA, NIOSH recommends less than 15 minutes of exposure per day.
The train horn noise level in Tipp City has been measured at 80+ decibels in the area from the Fire Department on Main Street to First Street. All homes and businesses in Tipp City between the tracks and the levee/bike path are effectively in this area, as well as nearly 1,000 homes west of the tracks; the noise level is measured at 90+ decibels one block from the tracks in each direction - from 4th Street to 6th Street at Main Street, which includes over 150 homes.
Studies have demonstrated correlations that link noise exposure to health and learning issues, including increased risk of cardiovascular disease; impaired reading, memory, and speech in children; sleep disturbance, which can lead to diabetes and other health concerns; and tinnitus (publications by the World Health Organization, Toronto Public Health, Federal Railroad Administration and the American Psychological Association).