In a move that will likely have purists up in arms, Porsche has fitted a so - called sound symposer to the new 911 Turbo to generate a synthetic soundtrack. (autoweek.com)
And a variable sound symposer brings the peppy EcoBoost engine's raspy exhaust note into the cabin when you want it, but tones down the noise factor when you don't. (automobilemag.com)
Sound symposer tubes amplify chosen powerplant frequencies in the cabin, but Porsche might hold tryouts for shorter wavelengths and higher - pitched voices. (automobilemag.com)