27 Soothing Sounds Machine for Baby Adults: For infants: Heartbeats echo womb rhythms—thump-thump in earthy warmth. Hushing sounds swirl like gentle waves, hushing cries to silence. Lullabies glow like firefly sparks, gently tugging eyelids to silken slumber. Explore 4 chromatic sound therapies: the purifying white noise static, deep brown noise rumble, crisp blue noise clarity, and balanced pink noise harmony. Drift into deep relaxation with 10 natural sounds like rain, ocean waves, and 8 artificial environmental sounds from tick-tock rhythms to crackling campfire.