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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. times. He then turned his other ear toward the tube and had a similar treatment. He then stood in the 20 foot path and another hearing test was made. But this time as he started to walk toward Mr. Dupont he shouted in a very loud voice. "Do you hear me now?" As the doctor reached the 10 or 15 foot mark, Mr. Dupont's eyes twinkled and he said he could hear. I could hardly keep from laughing because what happened was so apparent. The intensity of the loud voice from 15 feet was just the same as the weak voice at 2 feet. The doctor must have been aware of this but the patient wasn't. Mr. Dupont was quite elated until we got back to the laboratories to make another audiogram and it turned out to be exactly the same as the one made before he had the treatment. I explained to Mr. Dupont what had happened. This was tried again in about a week with the same result. After that Mr. Dupont never paid a visit to this doctor. Although my father is credited with the invention of the audiometer, he pointed out that, while the 2-A audiometer was patented in his name, it was not the first audiometer. There was a device made by Robert H. Seashore, dean of the Graduate School of Iowa State University, and also one by Lee Wallace Dean and C. C. Bunch at the same school. There was also a contemporaneous work on audiometers by Vern Knudsen at UCLA and Dr. Jones, a practicing otologist in California, and a preceding audiometer in the Bell System—the 1-A devised by R. L. Wegel and E. P. Fowler. However, it was the 2-A audiometer that proved most practical and was used most thereafter by audiologists and schools for hearing measurement. My father became well known for his work for the hearing handicapped. As a consequence, he met many interesting and some famous individuals. He tells this story of a meeting with Thomas A. Edison (Autobiography, pp. 62-64): He came to the laboratory with one of his Chief Assistants. We made tests of his hearing and found that he was very hard of hearing. If one talked very loudly into his ear he could understand. His hearing loss was about the same for high and low frequencies, which is very unusual for one
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