Loud wining sound in saturn vue

When I have had trouble with V-belts squeal or serpentine belts the belt is loose need to adjust tension or tension pulley bad. Belt wore and needs replacing or some of the pulleys are dragging while rotating or turning, could be bearing for pulley going bad.
Check belt is tight, look of high wear a lot of cracks in the belt. You can try loosening the belt and turning the pulley which will turn and see if they odd sounds or stiff to turn.
Car Sounds and Diagnostics ' Auto Repair Tips ' Paul Campanella's DE - Paul Campanella's Auto & Tire Center (campanellas.com)

How to Diagnose and Fix Belt Squeaks or Squealing Noise Issues - YouTube

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most def you need an alignment and you also need to check inner outer tie rod end and check the tires belt as well

pitch higher with the speed is just plain annoying
30 mph is mostly in traffic speed

what car and make
fwd or rear diff driven

if noise was not there before tyre change
but is there now
hard to narrow down the possibles in a forum

rear wheel bearing.

Based on your description: 150K+left rear slowed down much quicker than the right +/ and the humming noise, there is a great possibility that the Wheel Bearings will have to be replaced.

I have a 2002 saturn vue. Same thing..sounded like a jet engine ...loud humming as I accelerated . It got increasingly worse. It turned out to be the front wheel bearings. Replace them, now the noise is half as loud...have to do the rears also! 93,000 miles on it. Also, don't forget to replace the timing belt. It it goes too long and breaks, it will trash the engine...

It could be a loose heat shield on the exhaust system.They can sometimes come loose and rattle like crazy while idling.

we have a 2003 saturn vue which we installed new tires on and we noticed a noise about 6 months afterwards. it sounded to my wife and i to be loud road noise from the tires. the car was driven for 6 months and we decided the noise was annoing. had the tires checked only to find it was the left front wheel bearing which was replaced and stopped the noise.

I would suspect the wheel bearing, as these start to fail they tend to make more noise in one direction of load than the other.

check your tire tread, it may be worn in a choppy pattern and causing the noise. if your tires are smooth, then you have a wheel bearing problem