I've heard it claimed that white noise improves sleep quality, and anecdotally I've found it to sometimes be true. There are many white noise devices targeted at improving sleep, but research on the topic is scant.
Does anyone know of thorough studies looking at positive and negative effects of white noise generators and sleep?
I am skeptical of the general claim based on a few heuristics:
- I've found limited studies (and no meta studies)
- My own experience shows both positive and negative effects
- The available gadgets I've found do not cite reputable claims, instead relying on appeal to common knowledge or anecdote