Are babies hearing sounds that adults can’t?
Thanks so much for your really interesting question. We now routinely study the hearing of newborns before they leave the hospital and so we know that, unlike dogs and bats, babies cannot hear sounds outside the normal human hearing range (in fact it takes months for their hearing to get as sharp as an adult’s).
You are kind to tell you friends about the book, although most parents find that the Happiest Baby DVD is a much easier way (for women and men) to learn the fine points of the technique…and I recommend using white noise (like our CD of soothing sounds all night for the entire first year to help promote baby sleep…and prevent waking from teething,etc). Finally, FYI, from 9m-5y, The Happiest Toddler can do for older kids what THB does for babies…it is an unconventional approach that can almost immediately improve a toddlers cooperation, patience and dramatically reduce temper tantrums (I recommend watching that DVD a few times, then reading the book).