Also found in: Dictionary, Encyclopedia, Wikipedia.


Measurement of middle ear impedance and admittance in tympanometry. See: admittance, impedance.
See also: tympanometry.
[L. immitto, to send in]
References in periodicals archive ?
ii) Immittance Audiometer, Amplied 750 (Amplied, Italy)-Immittance audiometer with TDH 49 earphone, 226 Hz probe tone frequency, was used to evaluate the middle ear function of each ear of the clients.
Wilber and Feldman reported that immittance measurements cannot determine the extent of the air-bone gap with any degree of accuracy, but they can point to the probability of medically pathologic conditions.
The local VA audiology service conducted immittance and pure tone audiometric evaluations and obtained air- and bone-conduction audiometric thresholds to quantify the hearing function at different frequencies [20].
The results of audiometry, including acoustic immittance testing, were normal.
Acoustic immittance testing yielded a shallow tympanogram on the left, with normal reflexes and no decay of the acoustic stapedial reflex.
Although audiometry revealed that the patient's hearing was normal, close examination of the acoustic immittance results showed a borderline shallow tympanometry in both ears and a negative deflection of the ipsilateral acoustic stapedial reflexes on the right.
The immittance Findings were consistent with tympanosclerosis and otosclerosis.
Acoustic immittance tests showed normal tympanometry, acoustic stapedial reflexes, and acoustic stapedial reflex decay.
There was no evidence of a fistula sign on either electronystagmography or acoustic immittance bridge testing.
The audiologic evaluation included measurements of puretone air and bone conduction thresholds and the acoustic immittance pressure function.
10] Tympanometry and acoustic reflex testing were performed with the Grason Stadler 33 Clinical Immittance Bridge (GSI, calibrated in accordance with ANSI's 1987 specifications).
Twenty-five chapters cover approximation, frequency transformations, sensitivity and selectivity, passive immittances and positive-real functions, passive cascade synthesis, two-port synthesis by ladder development, resistively terminated networks, broadband matching networks, and a broad range of filters.