I previously posted a battery box description but here it is, You need a 10k linear pot and two 9v batteries.
Wire the batteries in series and wire the outer ends of the pot across the two batteries.
The series junction of the batteries will go to drive common, the slider of the pot will go to your ±10vdc drive input.
The current is insignificant.
Probably the motor is not noisy, but the form of the drive current to it.
If a DC motor, test it on an Automotive battery in both directions.