Brown Noise, Deep and Low

Forty minutes of brown noise: most of its energy sits in the low frequencies, so it sounds like a deep, steady rumble rather than a hiss, closer to a distant waterfall or the inside of a plane. Generated for Lullable, with no recording, voice or music in it, and faded in and out gently.

Why this one works at night

The lowest and warmest of the noises. It rumbles rather than hisses, like a far waterfall, and it is easy to forget. The pace is low and unbroken, and the whole of it is deep, warm, rumbling. Good for light sleepers. There are no words to follow and no music to wait for, and it fades out on its own at the end.