The "S" techniques that can help calm a fussy baby are swaddle, side or stomach position, shush, swing, suck, and soothing sounds. Learn more here.

Dr. Mitzner notes that white noise is generally considered safe if used correctly, however, it’s important to monitor volume levels and the duration of exposure to protect your baby’s hearing.

Sound. Use sound to calm your baby by singing or making a shushing sound directly into your baby's ear. ... put your crying baby down and take a break in another room for a few minutes to recharge.

Overstimulation. Infants can become easily overstimulated, especially if exposed to noise, light, or activity. This can lead to crying, especially when the baby is trying to settle down for the night.