I'm also having real problems with the noise like most posters here, especially on rough roads. It sounds like sitting inside a drum or a jet engine, or driving a car with several atrociously bad wheel bearings. I plastered every surface I could get my hands on with Noico, including wheel wells, trunk, doors. But not the floors since the battery with its cooling fluid makes a much more efficient sound deadener than anything I can add to it. Although all of this improved the noise level somewhat it was just not enough.
After doing some research I decided to attempt to lessen the reverberation from the tires on the underside of the car. I glued outdoor carpet on the underside of the battery - the smooth floor pans. That reduced the noise somewhat to barely acceptable levels. I would say that was the biggest improvement I made so far.
As far as I can tell the problem is with the construction of the car itself. The tire vibration gets transmitted through the suspension to the car's frame. Tesla would need to install suspension bushings that absorb these vibrations; and probably re-design the shapes and perhaps the materials of the suspension parts themselves.
On smooth surfaces the car is quite quiet now, but on rough surfaces it is still annoyingly loud.
After doing some research I decided to attempt to lessen the reverberation from the tires on the underside of the car. I glued outdoor carpet on the underside of the battery - the smooth floor pans. That reduced the noise somewhat to barely acceptable levels. I would say that was the biggest improvement I made so far.
As far as I can tell the problem is with the construction of the car itself. The tire vibration gets transmitted through the suspension to the car's frame. Tesla would need to install suspension bushings that absorb these vibrations; and probably re-design the shapes and perhaps the materials of the suspension parts themselves.
On smooth surfaces the car is quite quiet now, but on rough surfaces it is still annoyingly loud.