There are two primary types of hearing tests commonly used:
1. Otoacoustic Emissions (OAE) Test: This test measures sound waves produced in the inner ear. A tiny probe is placed in the baby's ear canal, which sends sounds and measures the echo that comes back. If no echo is detected, it could indicate hearing loss.
2. Auditory Brainstem Response (ABR) Test: This test measures how the auditory nerve and brainstem respond to sound. Electrodes are placed on the baby's head to record brain wave activity in response to sounds played through earphones.
