The Choice of Probe-Tube Position and Test Frequency in Determining the Intra-Aural Reflexes

Abstract

The present investigations have revealed changes in the sound pressure level in closed cavities with volume variations from 0.0 to 4.0 ccm, when under the influence of a tone of constant intensity and frequency. The changes are greatly dependent upon the frequency chosen. The method employed can be used for volume determination of small cavities, and may at the same time give enlightenment as to the most preferable position of the probe tube and the sealing material in the meatus during the electroacoustical registration of the intra-aural muscle reflexes.