A school nurse is using the Weber's test to check a child's hearing acuity. Which of the following actions should the nurse take?

Place a vibrating tuning fork on the top of the child's head.

Measure the amount of time the child can hear the sound.

Obtain a tympanogram reading prior to initiating the test.

Hold a vibrating tuning fork 1 to 2 cm (0.4 to 0.8 in) from the child's ears.