Gro-Hush by the Gro Company is a portable device that's meant to be held against an infant's ear for the purposes of providing white noise for a baby's relaxation.
The gadget is designed to be discreet and not disruptive for use at home or in public, while also delivering soothing sounds to an infant at a safe volume. The three sounds available on the device include a heartbeat, ocean waves or falling rain, which are commonly used in white noise machines for adults too. For optimum comfort, the device is built with a cushion to be placed on a baby's ear, which can be washed as needed.
Since it's not always easy to calm a fussy or crying baby, the Gro-Hush is definitely appealing to new parents who appreciate having a moment of quiet.