Final answer:
One way to test if the bone oscillator is in the right place is by moving the hair off the mastoid bone.
Step-by-step explanation:
One way to test if the bone oscillator is in the right place is by moving the hair off the mastoid bone. This is because the bone oscillator, which is one of the three tiny bones called the ossicles in the middle ear, is located on the mastoid bone. By moving the hair off the mastoid bone, the hearing professional can have a clear view of whether the bone oscillator is in the right position.