The document outlines various diagnostic tests used to evaluate ear function, including: - Otoscopic examination to visually examine the ear canal and eardrum - Whispered speech test and pure tone audiometry to test hearing ability - Tympanogram, auditory brain stem response testing, and electronystagmography to evaluate middle ear and vestibular system function - Additional tests include MRI, CT scans, and laboratory tests to further investigate causes of hearing or balance issues.