Tympanometry: Do we really understand its vertical axis?

By Ted Venema I believe there is a huge gap between the science of middle ear transmission and the clinical application of tympanometry. This is especially apparent for the clinician who attempts to make the leap from typical tympanometry to multi-frequency tympanometry. It concerns the vertical axis of the tympanogram. Obfuscation (look it up) offers…

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Fitting methods: “Islands in the setting sun”?

By Ted Venema In the beginning was Functional Gain. Real-Ear measures did not exist. All hearing aids were Linear. Sam Lybarger, whose inventions revolutionized hearing care in the 20th century, stood a Texas yard from the listener who wore the hearing aid, spoke in a normal conversational voice, and asked what sounded comfortably loud. He…

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