Table 1.

A tabulated list of the effects observed in previous studies with colour noise exposures

Colour noise	Summary of results	References
White noise	Noise exerted a positive effect on cognitive performance for the attention deficit hyperactivity disorder (ADHD) group and deteriorated performance for the control group, indicating that ADHD subjects need more noise than controls for optimal cognitive performance.	Söderlund et al.[8]
Pink noise	An inhibition pulse from the cortex may suppress the activation of reticular formation, which could make sleep under a steady noise deeper. However, the meaning of a depressed proportion of rapid eye movement under steady pink noise is not clear.	Suzuki et al.[13]
Pink noise	This study demonstrates that steady pink noise has significant effect on reducing brain wave complexity and inducing more stable sleep time to improve sleep quality of individuals.	Zhou et al.[14]
White noise	Playing of white noise was found to be a more effective nonpharmacological method on crying and sleeping durations of colicky babies than swinging.	Sezici and Yigit[15]
White noise	Having colicky babies listen to white noise decreases their crying durations and increases their sleeping durations.	Balci, 2006.[16]
White noise	White noise was found to be effective for this sample; however, there is a dire need for extensive research on white noise and its use with this vulnerable population.	Kucukoglu et al.[17]
White noise	According to the results, white noise is an effective nonpharmacological method to control pain, reduce crying time, and positively affect vital signs.	Karakoc and Turker[18]