I guess I took issue with the claim only because it was so poorly defined that in my view it could be misunderstood. If they had specified 'on ear', then their claim would be valid in the way you describe, but at the same time would be a somewhat inappropriate comparison since the main benefit...
I'm intrigued by a quote website selling ear protection -earplugs.
"Noise isolation (34-36 dB) far surpasses that of active noise-canceling earphones"
http://www.etymotic.com/ephp/er6.aspx
Surely that claim is impossible.
At the very least it could be classed as misleading if they're...