just wondering how many helmets do you guys own. everytime i see a nice design, feel like buying but its a total waste of money.

i have one open face for nearby travel and a full face helmet.

If it is ECE rated, it should be good.

Sharp rating is more rigorous and it costs a lot more to the manufacturer to send helmets in for the organization to test, so you'll typically only see this on high end models esp those that are used for racing.

ECE rating is mandatory for all helmets sold in Europe, but not in the US. ECE tests are done by the organization and are also more rigorous compared to DOT.

DOT is trickier. I saw videos explaining that DOT operates on an honor system, where manufacturers are allowed to put the DOT label on helmets they *feel* meet the standard and *intend* to test themselves. Bottom line, DOT helmets are not tested and verified by a regulatory body or organization, which is why you're likely to see this on lesser helmet brands.

I wonder where SIRIM sits in the scheme of things.

What kind of bike u are riding? Any wind shield?

Invest in a good helmet next time.

Quiet helmet as I know are hjc rpha 70, shoei gtair, schubert c40 pro.

I'm using rpha 70.
No regrets.

Sometimes a noisy helmet (wind noise) could be also due to wrong size or wrong fitment.

The valiant is known to be a loud helmet.

Most modulars are, given the clearances needed to allow for the chin bar to open easily. The more seams and openings, the more wind will seep in. The visor sealing on most modulars are also not as tight as normal full faces. The Valiant is also very aerodynamically inefficient and very wide, which means it catches air in all the wrong places.
A quiet modular is difficult to engineer, which is why Shubert's are so expensive, and also very stuffy.

If you want a quiet helmet, the Rpha 70 and Scorpoin 1400ST is both light and quiet and decently priced. I have the Rpha 70. The Rpha 90 is also fairly quiet for a modular. But then you are looking at a 2k lid.
As Skyblu has alluded to, poor fitment also contributes to wind noise. If you inadvertently bought a round headshape helmet for your oval head (as most of us have), then a lot of noise will seep in via the loose fitting cheek pads and neck roll, even before considering you got the right size, Most new helmet buyers dont realize that a new helmet fits uncomfortably tight until it breaks in and end up buying one size too big.

just for comparison, my Rhpa 70 is quieter than my MT Atom modular with earplugs.

On your next ride.
Try this
While riding, bring your shoulders up ... High enough to cover the lower opening of your helmet.
If the noise gets muffled .  There's the problem.  Cheek and side paddings too thin?

I wonder how u guys wear earplugs until becomes louder than other helmets?
I'm using foam type, and rolled, and pressed deep into ear canal. Almost no sound comes through.

It depends on how loud the wind noise.
Faster you go the louder it gets

Good thing is that I hardly ride at high speed.

On the highway 120kmh is good enough.

I tried wearing ear plugs , but stopped .  The pressure build up in my ears is not comfy .  And it's too quiet in which I don't really like, felt dangerous.

I'm thinking of maybe wearing earphones when I ride.
since it's always connected to bluetooth, can listen to songs/navigation.. also quite sound proof so kinda works the same as an earplug i guess? Not say fully block everything out but then like you said, if too quiet, it seems very weird

Does the Cardo Spirit able to join in into other Cardo units?
Also, with earplugs in, won't it block off the sound coming from the speakers of the Cardo Spirit?
Sorry might be newbie question but 0 experience on this so yeah

Just bought an LS2 Valiant II helmet.. sigh its too noisy even with earplugs.. anyone else have this helmet and have similar experience?

At 80 the wind noise is like me riding 120 with a cheapo MHR modular helmet..