PejvakAva MEA probe set is connectable to all of our typanometers and complete the pathway to obtain tympanogram and acoustic reflexes.
The acoustic reflex and the tympanogram are commonly used to assess middle ear function and are considered best practice. Each test yields invaluable information based on the delivery of acoustic energy (sound) to the ear canal. Thanks to microprocessors, the instruments used are now capable of rapid middle ear function assessment
An acoustic stimulus is presented to the external auditory canal; energy is transferred from the ear canal through the middle ear, some of which is reflected and some absorbed by the tympanic membrane and external ear structures. The premise behind the immittance instrumentation used to measure the acoustic reflex is the ability to accurately measure changes in reflected energy occurring from stiffening of the tympanic membrane as a result of contraction of the stapedius muscle. The amount of reflected and absorbed energy varies depending on the admittance/impedance (flow/resistance) of energy within the system and the complex interaction between the ear structures.