Ford puts its EcoBoost turbocharged motors in everything from the Ford Focus to the F-150. While we can certainly appreciate the sound of a turbocharger spooling up, some folks don't like turbo whine and prefer a more traditional naturally-aspirated engine tone.
Thus, company engineers use a simulator that determines the sound of the engine, along with noise, vibration, and harshness inside the cabin, using select parameters (muffled, no turbo whine, wind noise, and so on). Engine acoustics are tweaked before they're applied to actual vehicles using a series of mufflers or additional deadening material.
Ford had its simulator running on an Alienware laptop (possibly an M17x) with a pair of Sennheiser HD650 headphones, in case you're curious.