*  hearing tests
    *  acoustic impedance tests
    *  audiometry
    *  audiometry, evoked response
    *  audiometry, pure-tone
    *  audiometry, speech
    *  speech discrimination tests
    *  speech reception threshold test
    *  dichotic listening tests
    *  recruitment detection (audiology)
    *  otoscopy
    *  vestibular function tests
    *  caloric tests
    *  electronystagmography