The <a title="Scorpion EXO-1000 Series Specifications" href="http://www.x-ck.com/blogs/scorpion-exo-1000-series-specifications">Scorpion EXO-1000</a> does have a relatively "dirty", aerodynamically speaking, shell, with lots of vents, the rear spoiler, exhausts and those big round face shield removal knobs that stick out in the air flow. This makes the helmet louder than I think it should or could be.
Noise and tolerance thereof is subjective, of course, and I always wear high-quality ear plugs, but there is a wind rushing noise that seems to be generated around the top vents and the rear exhaust spoiler on the<a title="scorpion-exo-1000" href="http://www.x-ck.com/categories/scorpion-exo-1000-air"> scorpion-exo-1000</a>, along with a continuous low-frequency wind rushing noise around the bottom of the helmet, caused by turbulence and amplified when riding behind a short windscreen.
What I don't hear is the annoying whistling noise that can be caused by air passing over vent holes, and this is surprising. It isn't the loudest helmet I've tried by any means, but I'd say it's probably in the bottom third.
Remember that we always wear correctly fitted, high quality earplugs and an extra helmet liner when riding, and we strongly recommend that you always wear hearing protection also.
And also remember that your experience with noise levels will probably be different because it depends on many factors, including your head shape, the motorcycle configuration, prevailing winds and more.
Score: I'll give it a break and rate the <a title="exo-1000" href="http://www.x-ck.com/">EXO-1000 </a>as "Acceptable" for the amount of noise that it transmits.
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