wheel bearing, gearbox or wind noise
Supercharger?
Previas have a history of a whining noise coming from the catalytic converter. There is a bracket inside the converter that when loose or has came apart creates the whining noise during acceleration. It especially is very pronouced during high speeds in the freeway. You might be in for an expensive cat converter replacement.
if it sounds like a high pitched whining then it may just be your cool air intake
There could be many reasons why the Acura makes a high pitch whining noise. It could be that the brakes or the rotors are going out.
Fan belt slipping
If the pitch of the noise increases with speed and also comes and goes in turns i.e. it goes away in a left turn and returns or gets louder in a right turn it is probaly a wheel bearing going bad.
A plane typically produces a high-pitched sound due to its engines and aerodynamic design creating a whining or buzzing noise. This sound can vary in intensity depending on the aircraft's size, speed, and distance from the observer.
when warmed up high pitch noise at idle and it gets louder during acceleration Response to : Can someone actually answer this question? This is my question and the above answer makes no sense.
your manifold bolts are loose
That noise is completely normal as long it lasts for a few seconds, and it's caused for AC system in while it reaches its normal working pressure
The high pitch noise coming from your toilet could be caused by a faulty fill valve or a worn-out ballcock assembly. It is important to have a plumber inspect and repair the issue to prevent further damage.
wheel bearing
Probably a cat that you ran over!