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 Psychological Impacts of Noise 

Noise is unwanted sound that occurs in the environment as a result of many activities. Aircraft, traffic, and neighbors can be sources of noise and excessive noise exposure may have psychological impacts. Causal relationships have been discovered between noise and psychological effects such as annoyance, psychiatric disorders, and effects on psychosocial well-being. In addition, exposure to intense levels of noise has been shown to cause personality changes and violent reactions. The psychological impacts of noise also include an addiction to loud music. This was researched in a study where non-professional musicians were found to have loudness addictions more often than non-musician control subjects.