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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.

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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.

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.

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