Hearing tests could be subjective or objective. In a subjective test, the patient’s responses are taken into consideration while in objective tests, measurements are taken with the help of various instruments.
An Audiogram is a test wherein earphones are placed over the patient’s ears and patient is made to hear sounds of different intensities. The softest sound the patient is able to hear is recorded.
A Tympanogram involves placing a pressure probe into the ear canal and measuring the pressure in the middle ear. This provides vital information regarding problems with the middle ear.
A Brainstem Evoked Response Audiometry (BERA). is a test in which the response of the brainstem is measured through electrodes taped to a patient’s head. This test helps distinguish whether the the cause of hearing loss is in the middle ear(conductive) or in the inner ear (sensorinerual)
Otoacoustic Emissions are inaudible sounds emitted by the cochlea when it is stimulated by a sound. Individuals with normal hearing emit these sounds, whereas those with a hearing loss greater than 25-30 dBhL do not emit them.