sound deadener on 1999 Porsche 911

I love my car but I can't take the road noise. Whats the best way ti deaden the noise? I've heard of getting it undercoated and then someone else stated to but dynamat down in the back???

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2 answers
Did you try different tires? They could be the source of the noise.

Hell, do both. Is there a Porsche owners site that has opinions online?