I used EAR for years. I tried the custom fit jobies cost over £200 same problem put the helmet on and useless.
Switched to
These about 6 years ago they work a treat. Block the noise but can hear the intercom perfectly. Last about 2 years of regular use before the silicone looses it's seal. They have 2 levels both work well red really does block out more noise.
The thing to remember we're all built different, what works perfectly with one, won't on someone else.