Is a whining sound normal on an Altima 2.5S 2010 at a certain speed?

I hear a whining sound whenever I reach past 4K RPM (on the highway). One shop worker said he heard nothing and I know what the hell I heard. Right alongside the engine which is also loud as ****. But to be fair about noise level, my last car was a Lincoln Zephyr so I'm not sure if the loud engine is a concern... show more I hear a whining sound whenever I reach past 4K RPM (on the highway). One shop worker said he heard nothing and I know what the hell I heard. Right alongside the engine which is also loud as ****. But to be fair about noise level, my last car was a Lincoln Zephyr so I'm not sure if the loud engine is a concern or just me not used to the engine in this car.
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