Key points are not available for this paper at this time.
The clinical measurement of acoustic impedance at the eardrum is described. Significant modifications of the traditional Schuster bridge by Zwislocki led to the development of an acoustic impedance bridge that permits a sufficiently reliable and rapid determination of absolute acoustic impedance. The results of clinical investigation with this instrument demonstrate the value of the acoustic method in the evaluation of the status of the middle ear mechanism. The presence of conductive hearing losses due to various middle ear conditions may be detected and differentiated by objective and quantitative impedance measurements.
Alan S. Feldman (Sun,) studied this question.