New Rules Quieting Loud Factory Exhausts

by Member - Evanwritescars on July 31, 2019, 10:16 am

Love those loud sports exhausts on the latest BMWs? Well, you're not the only one. Unfortunately, regulators don't feel the same way. Which means that, according to a Mercedes-AMG product planner, that bringing the noise will soon be a thing of the past. And if it goes that way for AMG, it's not likely that it'll be any different for BMW.

“The regulations were getting pretty difficult for the sound to just come from the exhaust system,” Bastian Bogenschutz told Australia's Motoring. The new EU rules mean that instead of being tested in quiet mode, the cars will be noise-tested in the loudest mode possible. So those crackles and pops will need to be toned down to pass the rules.

And while automakers could send a loud version across the pond, keeping the quiet versions at home, Bogenschutz says that making different exhausts for different markets is too expensive. So AMG, at least, will be making cars quieter everywhere.

What will they be doing to keep the fastest cars feeling fast? More fake engine noise. Or at least more enhanced sound. BMW has been adding sound to the cabin since the last-gen M5. Which used a car stereo sound processor linked to the engine management. Simulating the engine noise and adding it into the cabin through the speakers. With louder noises in Sport and Sport+.

The Active Sound system has spread to other BMWs, covering much of the company's line. Expect more of the same, and more enhancement, as regs tighten.

We're, of course, torn on this issue. These loud exhausts can sound amazing. But it's been proven that noise stress is linked with numerous health issues including high blood pressure. And nobody likes the guy blasting down your street at 5am in first gear with might-as-well-be no mufflers. So if automakers make faux-sound more convincing, then we're probably ok with it. Still sounds better than electrics, at least.

Source: Motoring_a__a2_

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