I have a 1998 honda civic SI, as my dd, it has 330,000km's on it, and is 100% stock.
It has developed a low to medium pitch whine from the passenger side rear, it is loud enough that to drown it out with the radio, the radio has to be at an uncomfortable level. My first thought was wheel bearings, as shortly after I got the car, the front wheel bearings went and they had a similar whine. It needed rear brakes so last weekend, I put new rear drums, shoes, hardware and new SKF Rear hub / wheel bearing assemblies on the car. No luck the noise is still there.
Here are my observations to this point:
-Speed dependent grows louder with speed
-Not load dependent at all, same in neutral coasting or with the foot on the clutch, or even car off going down a hill, same going around corners, or straight.
-Tires seem to be wearing even, all have 40-41psi pressure in them.
-Tires are Michelin hydro edges with ~80% tread.
I drive about 50miles a day 40miles on the freeway at 60-70mph, this sound is driving me nuts, please HELP.