Rolls-Royce's newest Ghost perfects sound of silence

Austin, Texas: Searching for the "perfect" automotive sound idea is nothing new. Mercedes-Benz was bragging about its signature door "thunk" six years ago. Porsche manufactured a particular sound piped into its cabin to augment the otherwise near-silent ride of the electric Taycan sedan. The deep rumble of the Lamborghini Aventador can be identified from blocks away. But atop the pinnacle of luxury with machines that can cost $300,000 or more - twice the price of an average home in the US - crafting the perfect sound experience is of particular concern. The entrepreneurs and business owners and scions who own Rolls-Royces operate in extremely...