An iPatch, iRhythm, for atrial fibrillation.

We can also know who's likely to get atrial fibrillation.

So Diver A and Diver B both have a wearable computer and the dolphin hears the whistle as a whistle, the diver hears the whistle as a whistle in the water, but also as a word through bone conduction.

It's a color sensor that detects the color frequency in front of me (Frequency sounds) and sends this frequency to a chip installed at the back of my head, and I hear the color in front of me through the bone, through bone conduction.