[bgoated01]

I mean, we’re talking half as loud. I would have thought to a layman it would be a lot more impressive to remove half of a loud sound than half of a quiet one. But I’m wrong on that one judging by your comment, which is fine. To a noise control engineer whether the sound is loud or quiet makes no difference to how impressive it is because these are linear systems (unless we are talking extremely loud e.g. >140dB). Good point on the obvious measurement location.

[dylan604]

If I offer you half of a pie, you might think I'm being generous. If I then tell you the pie is actually only 5cm in diameter, you'd be disappointed. Receiving half of a pie that is 30cm would be much more impressive.

Telling me you removed half of something with out telling me the size of the something isn't compelling.

[brokenmachine]

You do have a general idea how loud an undampened car is, though.

Taking half of that noise away is pretty good, although a bit less good because it's only at certain frequencies.

[bgoated01]

Yeah, I guess the reason we're talking past each other here is I'm thinking of the tool; if I gave you a coin that would purchase half of any pie then the pie size is irrelevant. Put this tire on a different road and the absolute sound levels will change, but the sound difference with and without the treatment will not.