Impedance Measurements at the Eardrum as an Aid to Diagnosis 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 ... Research Article
Research Article  |   December 01, 1963
Impedance Measurements at the Eardrum as an Aid to Diagnosis
 
Author Affiliations & Notes
  • Alan S. Feldman
    State University of New York, Upstate Medical Center, Syracuse, N. Y.
Article Information
Research Articles
Research Article   |   December 01, 1963
Impedance Measurements at the Eardrum as an Aid to Diagnosis
Journal of Speech, Language, and Hearing Research, December 1963, Vol. 6, 315-327. doi:10.1044/jshr.0604.315
History: Received August 5, 1963
 
Journal of Speech, Language, and Hearing Research, December 1963, Vol. 6, 315-327. doi:10.1044/jshr.0604.315
History: Received August 5, 1963

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.

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