I keep forgetting to come back and answer this ...
Yes, I tried 'em, and I've been using one in my right ear, but it's either too big or too stiff for my left ear -- hurts after a short while and leaves various parts of my ear feeling bruised. So I've been using one of the green ones in the left. The purple ones do seem to cut out some frequencies that the green and orange one's let through. (If I rub two fingers together next to my ear, I can still hear that, but the low rumble of large trucks gets attenuated enough to matter.)
I had no idea my ears were so dissimilar from each other until I tried the purple earplugs. (I did know that I hear slightly differently in each ear...)
Re: Earplugs
Yes, I tried 'em, and I've been using one in my right ear, but it's either too big or too stiff for my left ear -- hurts after a short while and leaves various parts of my ear feeling bruised. So I've been using one of the green ones in the left. The purple ones do seem to cut out some frequencies that the green and orange one's let through. (If I rub two fingers together next to my ear, I can still hear that, but the low rumble of large trucks gets attenuated enough to matter.)
I had no idea my ears were so dissimilar from each other until I tried the purple earplugs. (I did know that I hear slightly differently in each ear...)