title: Comparison of pure tones and noise stimuli in sonotubometry.
abstract: Sonometric data on the Eustachian tube opening response to swallowing and to pressing the mandible down were evaluated in 51 normal ears and 62 ears with chronic disease. Testing with a narrow-band noise which was centered on 7 and 8 kHz gave the best results. The limit for a positive response was set at 3 dB, and of the normal ears, 80% showed a positive response in a short routine test. The data correlated reasonably well with surgical results. If test results point to tubal insufficiency, measures should be taken to prevent the formation of retraction pockets.
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D003679:Deglutition; D005064:Eustachian Tube / Q000502:physiology*; D006801:Humans; D008334:Mandible / Q000502:physiology; D008416:Mastoid / Q000601:surgery; D009622:Noise; D014432:Tympanic Membrane / Q000601:surgery