You might have heard of listening to white noise to help you sleep (in case you haven’t, click here to read our blog post on it), but there is another colour of noise that has been getting the attention of researches recently.
Pink noise is similar to white noise, but instead of having equal power across frequencies, pink noise comes out louder and more powerful at the lower frequencies. Pink noise is often found in nature, such as waves lapping on the beach, leaves rustling in the trees, or a steady rainfall.
Both a 2012 study in the Journal of Theoretical Biology and a 2013 study in Neuron found that participants who listened to pink noise enjoyed an improvement in the length of deep sleep. The 2013 study also looked at the memory of participants who were able to recall almost twice as many word pairs shown to them the previous night after sleeping with pink noise.
Listening to pink noise could help you enjoy a deeper and more satisfying sleep, but you may need to experiment with different colours of noise to see which one works best for you. More research needs to be done to compare the effectiveness of pink noise as opposed to white and other colours of noise.