Most people are surprised to hear how young the discipline of audiology really is, and just how recently its founding father established the profession. To put this in perspective, if you wanted to find the founding father of biology, for instance, you’d have to go back in time by 2,300 years and read through the The History of Animals, a natural history text composed in the fourth century BCE by the Ancient Greek philosopher Aristotle.

In contrast, to find the founding father of audiology, we need go back only 70 years, to 1945 when Raymond Carhart popularized the term. But who was Raymond Carhart, and how did he come to produce a separate scientific discipline so recently? The story starts with World War II.

World War II and Hearing Loss

One of history’s most reliable lessons tells us that necessity is the mother of invention, signifying that challenging scenarios prompt inventions aimed at relieving the difficulty. Such was the case for audiology, as hearing loss was coming to be a bigger public health concern both during and after World War II.

Indeed, the primary driving force behind the progression of audiology was World War II, which resulted in military personnel coming back from combat with extreme hearing problems caused by direct exposure to loud sounds. While many speech pathologists had been calling for better hearing assessment and treatment all along, the multitude of people affected by hearing loss from World War II made the request impossible to ignore.

Among those calling for a new profession, Robert West, a respected speech pathologist, called for the development of the speech pathology field to include the correction of hearing in 1936 — the same year that Raymond Carhart would graduate with a Doctor of Philosophy degree in Speech Pathology, Experimental Phonetics and Psychology.

Raymond Carhart Establishes the New Science of Hearing

Raymond Carhart himself began his career in speech pathology. He received his Bachelor of Arts degree in Speech and Psychology from Dakota Wesleyan University in 1932 and his Master of Arts and Doctor of Philosophy degrees in Speech Pathology, Experimental Phonetics and Psychology at Northwestern University in 1934 and 1936. Carhart was in fact one of the department’s first two PhD graduates.

Following graduation, Carhart became an instructor in Speech Re-education from 1936 to 1940. Then, in 1940 he was promoted to Assistant Professor and in 1943 to Associate Professor. It was what took place next, however, that may have changed the course of history for audiology.

In 1944, Carhart was commissioned a captain in the Army to head the Deshon General Hospital aural rehabilitation program for war-deafened military personnel in Butler, Pennsylvania. It was here that Carhart, in the context of helping more than 16,000 hearing-impaired military personnel, popularized the term audiology, designating it as the science of hearing. From that point forward, audiology would divide from speech pathology as its own distinctive research specialty.

At the end of the war, Carhart would go back to Northwestern University to develop the country’s first academic program in audiology. As a skillful professor, he guided 45 doctoral students to the completion of their work, students who would themselves become notable professors, researchers, and clinical specialists throughout the country. And as a researcher, among innumerable contributions, Carhart developed and enhanced speech audiometry, especially as it applied to calculating the efficiency of hearing aid performance. He even identified a distinct pattern on the audiogram that indicates otosclerosis (hardening of the middle ear bones), eponymously named the “Carhart notch.”

Raymond Carhart’s Place in History

Of history’s founding fathers, the name Raymond Carhart may not be as well known as Aristotle, Isaac Newton, Albert Einstein, or Charles Darwin. But if you wear hearing aids, and you know the degree to which the quality of life is enhanced as the result, you might place Raymond Carhart on the same level as history’s greats. His students probably would, and if you visit the Frances Searle Building at Northwestern University, you’ll still see a plaque that reads:

“Raymond Carhart, Teacher, Scholar, and Friend. From his students.”

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