wirring sound comming from front end not clutch gearbox or bearings

Start with removing the external drive belts and running the engine if the noise is still there it will proberbly be a faulty timing belt idler or tensioner bearing. check this and let me know what you find, if in doubt about doing this get a mechanic to do the check for you.

The differential (final drive) bearings in the gearbox may be bad. When was the last time the gear oil has been changed?