Noiseless Engine : ( alot of new cars fake engine sounds through speakers)

Stomp on the gas in a new Ford Mustang orF-150, and you'll hear a meaty, throaty rumble,the same style roar that Americans haveassociated with auto power and performancefor decades.
In some of America's best-selling cars andtrucks, the engine growl is a finely tuned bit oflip-syncing,boosted through special pipes ordigitally faked altogether. And it's driving carenthusiasts insane.
Fake engine noise has become one ofthe auto industry's dirty little secrets, withautomakers from BMW to Volkswagen turningto a sound-boosting bag of tricks. Withoutthem, today's more fuel-efficient engineswould sound far quieter and, automakersworry, seemingly less powerful,potentiallypushing buyers away.
Softer-sounding engines are a positivesymbol of just how far engines and the gaseconomy have progressed.But automakerssay they resort to artifice because theyunderstand a key car-buyer paradox: Driverswant all the force and fuel savings of a newer,better engine but the classic sound of an oldgas-guzzler.
"Enhanced" engine songs have becomethe signature of eerily quiet electrics likethe Toyota Prius.But the fakery is nowincreasingly finding its way into even beefy
trucks and muscle cars, long revered for theiriconic growl.
For the 2015 Mustang EcoBoost,Ford soundengineers and developers worked on an"Active Noise Control" system that amplifiesthe engine's purr through the car speakers.Afterward,the automaker surveyed membersof Mustang fan clubs on which processed"sound concepts" they most enjoyed.
Ford said in a statement the vintage V8engine boom "has long been considered themating call of Mustang" but added that thenewly processed pony-car sound is "athleticand youthful," "a more refined growl" with "alow-frequency sense of powerfulness."

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