Abstract
The method to examine the middle ear conduction system using Acoustic probe is in wide use since Zoellner reported it in 1951. Recently criticism is heard louder that the method, by which the examiner holds Acoustic probe in his hand, results in greater biometric errors with less clinical implication for cumbersome procedure. The author developed his own Acoustic probe. It was aimed for quantitative recording of minute changes of the middle ear conduction system by applying pressure to the sound tip. And the hearing test by Acoustic probe was re-evaluated. One hundred diseased ears were tested by this new apparatus. It was shown that the new method enabled the sound to keep stable pressure on the tip and produced dependable results. The maneuver was simple and easy. Furthermore, loading test doje by this method showed that mobility of the middle ear conduction system in some cases was not so poor as it was thought to be by the previous method.
