is softer in high-frequency tones and stronger in low-frequency tones than white noise. According to The Sleep Foundation, it ...

It may also refer to a type of noise that's so low in frequency or intensity that it's not audible to the human ear. Either way, it's not relevant to anyone looking to try to improve their sleep.

"Its low-frequency focus creates a sense of ... making it ideal for tackling high-intensity mental tasks. Noise colors aren’t just for sleep or productivity. They’re also a hidden force ...

Two years ago, 13-year-old Clarisse Poon was looking for relaxing music to help her sleep, but the ... are the most common. White noise contains every frequency humans can hear.