Soft music or humming can reduce crying intensity and increase the duration of calmness. Colic Relief Tips for Parents - HealthyChildren.org

To quickly soothe a colicky baby, research suggests using low, rhythmic sounds that mimic the environment of the womb. These "white noise" sounds can help trigger a baby's natural calming reflex, allowing them to fall asleep faster during intense crying bouts. Quick Calming Sounds for Colic

In an emergency, running a vacuum cleaner, a fan, or a clothes dryer in a nearby room can provide the necessary rhythmic noise to settle a fussy infant.

Recording of a mother's heartbeat or "womb whooshing" can provide instant relief by recreating the safe atmosphere of the womb.

These sounds mask household noises and provide a consistent, soothing background that babies find familiar.