"Once people drifted off to sleep with the aid of warm milk and a bit of sheep counting. These days, they may also get some bedtime help from a clever microprocessor.
A new tabletop machine from Adaptive Sound Technologies uses its algorithms to create soothing bedside sounds. Sound machines have existed for years, but the machine, called Ecotones ($299), adds a new, responsive twist: When the soundtrack is running and it senses a disruption to bedroom quiet, it responds immediately with additional cloaking sounds.
Set the dial to ocean sounds, for example, and it produces the sounds of continuous rolling waves, fog horns and the calls of sea gulls. But if a truck suddenly rumbles by outside the bedroom, the machine detects the racket and masks it by producing an extra crashing wave or two."
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