Mercedes S600 ----> Hyundai Genesis

[GripperDon]

SAMMYb is correct.

My Genesis is exceptionally well insulated from outside noise, but road transmitted noise is bad. Poor isolation of body mounting points is the problem.

 

[Disaster]

SAMMYb is correct.

My Genesis is exceptionally well insulated from outside noise, but road transmitted noise is bad. Poor isolation of body mounting points is the problem.

What "body mounting point" insolation do you purpose?

The Genesis is a monocoque design, with the suspension members solidly connected to the body. The way these types of bodies are refined to limit noise is by stiffening the body and suspension arms and adding dampening materials to the sheet metal. The Genesis employs all those techniques.

Unless you decouple the suspension from the frame with a powertrain undercarriage or switch to body on frame you will get impacts transmitted into the cabin. The impacts will be worse when the suspension is stiffer and the tires are sportier and lower profile.

 

[jmyrons]

I can only attest to my empirical evidence, but I'd have to agree with GripperDon and SammyB. While I have no other luxury cars I drive to compare my Genesis 4.6 to in terms of relative quietness, I am a bit disappointed by the magnitude of the road noise I hear when driving on worn concrete interstate highways (I405, I90 & i5) here in the Seattle area. I think to a some extent it may be the Dunlop tires (wish I had Hancooks instead) as SammyB stated early on. But the noise is certainly coming from tire contact with the road and is not wind noise.

 

[Paulroger]

I can only attest to my empirical evidence, but I'd have to agree with GripperDon and SammyB. While I have no other luxury cars I drive to compare my Genesis 4.6 to in terms of relative quietness, I am a bit disappointed by the magnitude of the road noise I hear when driving on worn concrete interstate highways (I405, I90 & i5) here in the Seattle area. I think to a some extent it may be the Dunlop tires (wish I had Hancooks instead) as SammyB stated early on. But the noise is certainly coming from tire contact with the road and is not wind noise.

Some of the roads in Central Florida (particularily the old concrete ones and other back roads) seem to result in excessive road noise transmitted by the Dunlops. I am currently into month 5 of a 3 year lease and I am considering replacing the Dunlops with the Continental DW's and putting the Dunlops back on at the end of the lease. That is if the road noise factor is that much of an improvement with the DW's. Anybody have an opinion on replacing the tires now or would the change in road noise be negligible?
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[Hghwy52]

The Genesis is a quiet car but no quieter than a 2000 Avalon when new. The Avalon was quieter from outside noise but less quiet from road noise. The Avalon, I think, had better window seals in particular and would cause a more pronounced "ear pop" when the sun roof was opened or closed at speed. On the Genesis, I had to place a piece of soft plastic between the B pillar, inside door panel and window to quiet the sound of passing cars. DB meters only tell part of the story and don't measure exactly the perception of sound. In any case, the genesis is plenty quiet enough.