Noise has always been very common environmental problem for mankind. Noise leading to hearing loss is one of the most common neurological disorders. In defence scenario, armed forces are exposed to the following types of noise: tanks, aircrafts, bombardment, missile launching, ammunition trials etc. Noise incites both direct (hearing loss, tinnitus) as well as indirect effects (anxiety, depression, annoyance, etc.). Environmental noise has multiple effects on human health. Some of these effects such as raised blood pressure; hearing loss and cognitive impairments may have implications for adult health as well. In this review, we consigned that noise affects memory storage, cognitive decision making, executive functions that are the foremost requirements for human being. Psychological behaviour like argumentativeness, mood fluctuations, incapability to face stressful situations hamper the performance and lead to a poor quality of life. Noise exposures disturb the balance of awake and sleep modes of brain activity leading to neurological change