[DenverTaco07]

Originally Posted by 90503

...And from the GM press release....:

Each engine has been carefully tuned for a distinctive performance sound. All 2.0L turbo models feature active noise cancellation, which uses sound waves to cancel unwanted cabin noise. Models equipped with the available Bose audio system also feature engine sound enhancement, which amplifies the native sounds of the 2.0L turbo engine – and can be disabled based on the driver’s preference.

Both the 3.6L V-6 and 6.2L V-8 feature mechanical sound enhancers – resonators that direct induction noise from the engine bay into the cabin. Both engines are available with a dual-mode exhaust, which features electronically controlled valves that bypass the mufflers under acceleration, delivering improved performance and greater sound levels. With the dual-mode exhaust, drivers can personalize the exhaust sound, from a “stealth” mode to the most aggressive “track” mode.

Originally Posted by FenwickHockey65

It cancels out excessively harsh engine noise, like booms. It's a bigger problem with the 4-cylinder Thetas, which is why it was standard in those cars. Basically it uses microphones to pick up harsh engine noises then sends out an opposing sound wave through the audio system to cancel it out.

I'm not sure exactly what noises GM's targeting with Camaro though.

Originally Posted by FenwickHockey65

By the way, it sounds like the 2.0T's "fake engine noise" isn't exactly fake in the sense the EcoBoost's is. Sounds like it's just microphones that pick up the engine noise and play it through the speakers.

Thanks gents... that clears it up...be running stealth mode if I leave the house before 7am.