It blocks unwanted signals from interfering with the receiver. The inductor, which determines the proper frequency, also shrinks to a micron-sized wire loop. Bundling microcomponents also resolves the problem of sufficient power. Larger prototypes required bit batteries, yet couldn't operate for years like a watch. Clarity is another concern.
Most phones strain to understand voice-based instructions and conversation crackles.
But Gammel's microcomponents sound impressively clear. Luciano Pavarotti's tenor pealed like a church bell. Seeing the person you're talking to enhances the human experience.'' Not everyone agrees the device would sell, even if it works. Design gurus say a new device ultimately will fail if it does not easily do what people want. No more, no less.