The result is a pair of intelligent, high-fidelity active sound-reduction earplugs that allow natural hearing when sound is safe and provide automatic protection from both loud, sustained music and sudden, loud percussive sounds.

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Calling style investing with index funds as active management may sound like heresy to some in the index community.

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Extras: Cold weather package, driver assist package, luxury seating package, premium sound package, 20 inch wheel with performance tires, active roll stabilization, instrument panel with leather, ceramic controls, and BMW apps.

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As sighted drivers do, Mark made active use of his other senses such as sound, listening to the noise the tires generate rolling over the roads, and used the sense of angular and linear acceleration perceived from his inner ear to make judgments and adjustments to the controls of the vehicle.

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It's not just the sound source that's on the loose either, as the companion active subwoofer uses a bespoke low-latency 2.4GHz connection (claimed to be 0.01 seconds delay) too -- no more hiding wires around the back.

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There is active 3D television with goggles and loaner blu-ray discs, surround sound, multiple wireless tablets that control everything from lights to curtains to room service menus - in seven languages, internet radio with thousands of choices, free international phone calls, the list goes on and on.

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