The Shh... can be any loud, white noise (page 140). White noise switches on the calming reflex. To Shh... effectively (page 145):
- Place your mouth 2-4 inches from baby's ear
- Raise your volume of Shh... to match the level of noise your baby is crying at.
- Don't soften the Shh... until her crying noise level decreases.
Karp says at first, it might take your baby a minute or two to react to the Shh..., but as you get good and your baby gets used to it, it should take seconds.
He also says the noise doesn't need to be a Shh... necessarily. It can be a hum or a chant. He also lists ten other ideas (page 147):
- Noisy appliance like a blow dryer or vacuum
- Fan, microwave fan, or bathroom fan
- Running water
- White noise machine
- CD with white noise sounds
- Toy bear with a recording of uterus sounds
- Static on radio or baby monitor
- Clothes dryer with sneakers or tennis balls inside (but don't put baby on the dryer)
- Car ride