Silence in a Rolls-Royce Phantom is not a metaphor; it is a line item. Buyers routinely spend as much on acoustic options as many people allocate to an entire car, treating quiet as a core luxury, not a byproduct. In that world, the marginal utility of every decibel removed is high, because comfort, privacy and perceived build quality are all encoded in sound, or the lack of it.The hush begins wit...More