no to both questions, but the noise is coming from the alternator. It resonates through the speakers in the car, but i've stuck my head under the hood when it happens and that's where it's coming from.

1999 Silver Frost SVT #609 of 2760 Quaife, lightened SVT Flywheel, SPEC stage II clutch, removed resonator, k&n drop in - various other goodies too.