Sounds like one of the front wheel bearings have worn out and has become noisy, You can get a estimate here https://repairpal.com/estimator/chrysler/pt+cruiser and locate a repair shop here https://repairpal.com/chrysler-repair-in-covington-georgia
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Sounds like a front wheel bearing. Jack up the car and spin the wheel by hand. If the sound is loud I suspect you will hear grinding and maybe some slop where you can wiggle the wheel. Do not delay addressing this issue, you could loose your wheel.