Green noise can help provide a calming, more relaxed feeling right as you’re about to go to sleep. Putting on green noise in the background is especially good for those who prefer having some ambient sounds in the background at bedtime, even if that’s just the sound of a fan. Since it’s also only around 500 hz or so, green noise has relatively few waveform vibrations per second. As such, this frequency is low enough that it’s unlikely to be too loud for your ears while you drift off to sleep—the louder the frequencies, the more sensitive we are to them. In other words, green noise is perhaps the most relaxing of the sound colors!