Now, the shushing really really doesn't sound like anything I would consider to be "soothing" for a baby, but Doc Karp remarks that the sound of a woman's blood flowing through her veins sounds about as loud as a vacuum cleaner to the growing fetus. I'm not sure if that's true (a cursory Google search didn't turn up anything), but there are a lot of mothers in one of my pregnancy forums who swear by this method - basically, every one who of them who has tried it says that once they figured out the right formula for their kid (some kids were more responsive to one particular step than others), it worked like a charm.
Has anyone out there ever tried this or heard of it? Would any of you with infants be willing to give it a shot and share the results with us? Y' know...for science?