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Acoustic resistance, reactance and phase angle were assessed for the two probe tone frequencies (220 and 660 Hz) on 29 otosclerotic middle-ear systems under accurately defined experimental conditions. Only otosclerotics with normal tympanic membranes were accepted in this statistical survey. The main purpose of these measurements was to provide numerical(More)
A formula has been elaborated to estimate the resonance frequency of the middle ear from non-simultaneously recorded susceptance and conductance tympanograms at 220 and 660 Hz. The formula is tested on 30 normal and 29 otosclerotic ears. From these experimental results one can conclude that the middle-ear model (proposed by Lutman), from which the formula(More)
We studied a group of adults and a group of children. All the test subjects were member of the swimming club and were subjected to an intensive training program for competition swimming. Two easy to perform Eustachian tube tests were compared, i.e. the Bluestone 9 steps test (tympanometry) and the measurement of the opening pressure with a pressure(More)
It was our aim to analyse the frequency spectra of these different stimuli in order to select the most suitable stimulus as one wants to apply BER either as objective audiometry or as oto-neurological means of diagnosis. The kind of stimulus is important because its characteristics will condition the parameters of the electro-physiological response. As(More)
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