This procedure is help to measure the function and movement ear drum and middle ear. This procedure also known as Tympanometry and the graph know as tympanogram.
Types of Tympanometry
There are many types of Tympanometry.
- A Type
- As Type
- Ad Type
- B Type
- C Type
Q: What is Tympanometry?
Ans: Tympanometry is the measurement of change in aural impedance or compliance depending on air pressure in the external acoustic meatus (ear canal) (according to EN60645-5).
When tympanometry is performed using the system, the air pressure is changed smoothly in the ear canal and the acoustic compliance (i.e. the ease of sound wave transmission through the sound-conducting apparatus of outer and
Through the sound -conducting apparatus of outré and middle ear) is estimated. The wave which reflects the dependence of compliance on air pressure is called a tympanogram.
Q: What do the results of tympanometry tell us?
Ans: If there is an impairment involving the middle ear(stapes fixation, otitis media, tympanosclerosis), the stiffness (and/or the mass) of the sound-conditioning apparatus increase i.e., the admittance decreases. This results in tympanogram flattening and/or in change of its form. If there is damage of ossicular chain and atrophic scars of tympanic membrane (or its hypermobility), the admittance increases sharply as compared to the normal values. In this case high amplitude tympanograms are observed.