Tympanometry Tympanometry is an examination used to test the condition of the middle ear and mobility of the eardrum (tympanic membrane) and the conduction bones, by creating variations of air pressure in the ear canal. Diagnostic Hearing Evaluations The audiometric evaluation consists of pure tone air and bone conduction testing. Testing pure tones is done to determine the degree of hearing loss and whether hearing loss is conductive or sensorineural. Speech audiometry is obtained to evaluate the individuals ability to understand speech at an elevated comfortable volume. Speech discrimination is also tested to determine how much a person will understand when wearing hearing aids.