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How to do a hearing screening with an audiometer?
You can do a hearing screening with an audiometer in two ways. Firstly, you can make a quick audiogram with four frequencies and no lower than 20 dB to get a quick overview of the hearing thresholds. Secondly, your patient can make their own audiogram by performing an automated test if available on the audiometer.
A middle ear infection, also known as otitis media
Fluid in the middle ear
A perforated tympanic membrane
Issues with the Eustachian tube that connects the upper throat and nose to the middle ear
The test can be performed every few weeks for some months to determine how much fluid is in the middle ear over time. Adults also undergo the test as part of a routine hearing test to establish any problems with the middle ear.
A tympanogram provides a graphical representation of the functioning of the eardrum in response to changes in air pressure within the ear canal.
When sound waves activate the eardrum, part of the sound is absorbed, passing to the middle ear. The other part of the sound is reflected. With this information on the tympanogram, the doctor can analyze the middle ear functions, especially the Eustachian tube function.
Your ear is made up of three parts—the outer, the middle, and the inner ear. The OAE test is used to find out how well your inner ear, or cochlea, works. It measures otoacoustic emissions, or OAEs. These are sounds given off by the inner ear when responding to a sound. There are hair cells in the inner ear that respond to sound by vibrating. The vibration produces a very quiet sound that echoes back into the middle ear. This sound is the OAE that is measured.
If you have normal hearing, you will produce OAEs. If your hearing loss is greater than 25–30 decibels (dB), you will not produce these very soft sounds.
This test can also show if there is a blockage in your outer or middle ear. If there is a blockage, no sounds will be able to get through to the inner ear. This means that there will be no vibration or sounds that come back.
Tympanometry refers to a test that helps in the evaluation of the proper functioning of the middle ear. The middle ear is positioned behind the eardrum, also known as the tympanic membrane. The test seeks to establish the condition and movement of the tympanic membrane as it responds to changes in pressure. The test helps…
