Body position and acoustic admittance.
The purpose of this study was to determine the effects of body position on the acoustic admittance of the normal middle ear mechanism. Susceptance tympanograms were obtained and their values recorded to determine the significance of any differences among five different body positions. A positive pressure shift was found to occur at the point of maximum compliance between the upright body position and the remaining four recumbent body positions. Attention should be given to the effects that differing body positions have on acoustic admittance whenever assessment of this nature is anticipated.
D000158:Acoustic Impedance Tests; D000328:Adult; D000399:Air Pressure; D001309:Auditory Threshold; D004424:Ear Canal / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D011187:Posture