A Chamber of the Stillness of Death: Phyllis M.T. Kerridge’s Experiments in the Silence Room

I’m beginning a new project on the historical contributions of women to otology, many of whom have been overlooked in scholarship. My current article investigates the physiological work of Dr. Phyllis Margaret Tookey Kerridge, who died on June 22, 1940, the only daughter of Mr. William Alfred Tookey of Bromley, Kent. She was educated at the City of London School of Girls and at University College London; her graduate studies commenced at the latter institution, first in chemistry and then physiology, where she was also appointed as lecturer. She also held posts in the London School of Hygiene and Tropical Medicine, the Marine Biological Association Laboratory at Plymouth, the Carlsberg Laboratories at Copenhagen, and at London Hospital. She received her M.D. from University College Hospital, in 1933 and became member of the Royal College of Physicians in 1937.[1]

During the 1930s, Kerridge conducted experiments to measure the residual hearing capacity of children in London County Council schools, as well as experiments in teaching with electronic hearing aids. Much of her research was on patients at the Royal Ear Hospital, who were tested in the hospital’s “Silence Room:” a 3,500 cubic room in the basement of the hospital’s new building on Huntley Street, with

“walls impenetrable to extraneous noises and which will never reflect, deflect nor refract sounds—a chamber of the stillness of death, where absolute accuracy and complete consistency in results will be obtained.”

The room was built so exact tests to measure degrees of deafness can be made in ideal and constant conditions. Such stillness in this room apparently allowed people to hear heartbeats and the “flick” of their eyelids! A small table and two chairs were placed in the room. There was a bell to call the Porter’s room and an electric fan affixed there as well.

The Committee of the Royal Ear Hospital occasionally granted permission to medical practitioners to use the Silence Room for their own research purposes. For instance, in 1929, they granted the otologist Dr. Charles Skinner Hallpike (1900-1979), a research scholar from Middlesex Hospital, to use the room free of charge. Hallpike is particularly known for his ground-breaking work on the causes of Meniere’s disease (a disorder that causes episodes of vertigo) and for the Dix-Hallpike test for diagnosing benign positional vertigo (sensation when everything is spinning around you).

The Western Electric 1-A Audiometer in clinical use at the Central Institute for the Deaf in St. Louis, c.1920s. Western Electric produced only about 25 of these audiometers, which retailed at about $1,500 in 1923. (Central Institute for the Deaf Collection)
The Western Electric 1-A Audiometer in clinical use at the Central Institute for the Deaf in St. Louis, c.1920s. Western Electric produced only about 25 of these audiometers, which retailed at about $1,500 in 1923. (Central Institute for the Deaf Collection)

The hospital’s 1938 Annual Reports reveals that Kerridge was appointed to research at the Silence Room, then renamed as the “Hearing Aid Clinic,” working alongside Mr. Myles Formby to conduct hearing test on the hospital’s patients. Though the Clinic was initially started on a 6-month trial period, Kerriddge’s work was so beneficial that the hospital Committee decided to let her continue her research work and audiometer tests, extending care to private patients as well. They provided her with two more rooms in the basement, one as a waiting room and the other as an office, as well as the services of Miss W.J. Waddge as an assistant. In 1939, Kerridge viewed 170 cases, and according to the reports, her work among deaf patients was successful in helping many of them to be fitted properly for hearing aids.

Wartime of course, changed the course of things. The clinic was abandoned during World War II, but the hospital still provided hearing tests with the audiometer to test the hearing of patients suffering from “bomb blast.”

NOTES

[1] Nature 146 (august 3, 1940).

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The Time-Travelling, Vote-Gathering, Miraculous Acousticon

An 1922 advertisement in The Illustrated London News caught my eye:

deaf

Look at the flapper! Is she being coy? Ignoring the gentleman who’s obviously flirting with her? Or is she deaf to his fancy words?

This was the first half of an advert for the “Acoustion,” which claimed it could restore hearing in deaf individuals and improve their lot in hearing culture:

Why…should you be debarred from the pleasures of attending church, theatre, concert or conference? Why, when there is an instrument that will neutralise your deafness, should you be prevented from entering into conversation without difficulty, and listening to music without effort?

The Acousticon was one of the first portable electric hearing aids, the invention of American engineer Miller Reese Hutchison (1876-1944).

Acous_Hutchinson

He invented the first electrical hearing aid around 1895, called the “Akoulallion” (Greek for “to hear” and “to speak”), a table instrument that was connected to a carbon microphone and earphones—essentially, a “microtelephone.” The device was sold in limited quantities for $400 out of The Akouphone Company, which was established by Hutchinson and James H. Wilson in Mobile, Alabama in 1898/9. In 1901, the Akoulallion is redesigned and sold as the “Akouphone,” at a retail price of $60. The bulky nature of these devices made them unpopular and thus did not sell well. For instance, in the 1902 The Silent Worker, the popular newsletter for deaf individuals, Alexander L. Pach wrote:

Some question has been raised as to Mr. Hutchinson’s sincerity and belief in the efficacy of his machine [the Akoulallion]. There should not be any. Mr. Hutchinson was sincerity itself. He believed what many deaf people told him, and it’s a surprising fact that many of us who are deaf were fooled by that they experienced. I had intelligent deaf people tell me that they heard, where they only felt the vibrations, and these vibrations needed no machine to bring them out. Such a great number of the deaf are unable to distinguish between hearing and feeling that they were the means of deceiving the inventor, and some of our expert teachers, hearing ones, who stood by were fooled, too.

In 1901, Hutchison moved to New York and continued inventing new devices through his new company, the Hutchison Acoustic Co., operated along with Willard S. Mears. The “Acousticon” was shortly introduced, a more portable version of the Akouphone and powered by batteries; it had three components, cost 10 guineas, and the batteries lasted from a few hours up to a week. It was deemed a miraculous invention and adverts asserted the deaf that it was recommended, if not favoured, by many aural specialists.

Surdus in search of his hearing
The Acousticon. From: Evan Yellon, Surdus in search of his hearing (1906)

A patent was granted on August 25 1903 (U.S. Patent 737,242). The specifications outline that:

This invention is a portable telephonic apparatus intended to be used by persons with impaired hearing…[It can be] adapted to be used in a room or hall to enable partially-deaf persons to hear speech, music, or other sounds which are ordinarily heard by persons with normal hearing powers.

HutchinsonPatent1

Hutchison was prominent in publicizing his invention, even exhibiting it at the Louisiana Purchase Exposition. Queen Alexandra of Denmark counted herself as a grateful customer.

The virtues of the Acousitcon were tested by selected deaf and partially-deaf individuals in New York, who offered their professional opinions of the instrument. R.E. Maynard tested the device and notified readers of The Silent Worker that

the result was exactly the same—something that approximated sound was sent through the ear, which was rather more a sense of feeling, than of real hearing. It was so faint that no distinction could be made without the inventor first teaching the difference of sounds in the words “papa,” mamma,” “hello.” The notes from the piano and banjo could be differentiated, while the finer and shriller notes of the guitar and cornet could not, although the sound was thrown into the ear by some powerful current. It is probable the same difference in sounds could be distinguished by a deaf person holding in his hands an empty cigar box. While it was shown that bona fide deaf-mutes have little hope of making practical use of the Acousticon, it was clearly demonstrated that the device will prove highly helpful to the hard of hearing, and for that purpose is probably a great success (1903).

Hard-of-hearing Lucy Taylor was delighted at the benefits of the instrument. In 1913, she wrote to the Silent Worker:

It gave me the first ray of hope I have had in many years, for surely Mr. Hutchison knows what he is talking about. I have long felt, that if someone who understood, cared enough to really try, something might be invented, that would do for the partially deaf what glasses do for the partially blind.

The Acousiton’s advertisements were spectacular, quite eye-catching, even used during elections and maybe the device was even used by time-travellers!* Adverts highlighted the numerous satisfied customers across North America and Europe–this ad in particular indicates that there was a Toronto office branch.

acousticon1916

He also invented another variation of the Acousticon, the “Massacon,” which converted audio into vibrations.

photo 1
From: Evan Yellon, Surdus in search of his hearing (1906)

This variation was for those with more profound hearing loss, but the price was high: 12 guineas up to 23 pounds when sold in England through the company Acoustic Patents, Limited. A table version was also adopted in schools for the deaf, particularly in Chicago and San Francisco as a teaching tool to teach deaf pupils speech.

From: Evan Yellon, Surdus in search of his hearing (1906)
From: Evan Yellon, Surdus in search of his hearing (1906)

By 1905, Hutchison sold his company and the rights to Kelley Monroe Turner (1859-1927) who would introduce various types of the Acousticon, some with volume control.

*The idea of a time traveller with a bulky hearing aid (or cellphone) struck me as really funny–imagine all the hijinks! No? Okay…
 

 

The Audiphone

I wrote a new entry over at Nineteenth-Century Disability: A Digital Reader:

On September 1879, Richard Silas Rhodes (1842-1902), president of a publishing company in Chicago, received a patent for his “Audiphone for the Deaf” his various improvements to the device. (U.S. Patent No. 319,828). Rhodes had conductive hearing loss[1] for twenty years following a bout of illness and was frustrated with his continuous failed encounters with ear trumpets. He observed he could hear the ticking of his watch when he held it in his mouth, and this inspired his construction of the Audiphone, which exploited the fact sound waves can be transmitted through the teeth or cranial bones.

Continue Reading…

Webster’s Otaphone

I wrote a new entry over at Nineteenth-Century Disability: A Digital Reader:

UK patent #7033, dated 17 March 1836, is the earliest British patent for a hearing aid device, granted to the aurist (19th century term for ear specialist) Alphonso William Webster, for his “curious” invention, the Otaphone (sometimes spelled “Otophone”). In his publication, A New and Familiar Treatise on the Structure of the Ear, and On Deafness (London: published by the author, sold by Simpkin & Marshall, 1836), Webster outlines he was first devised his invention by observing the common practice of cupping the hand to the back of the ear to enhance hearing. He wondered whether the practice could be obtained by “means less troublesome and unsightly” (132).

Continue Reading…

French Perspectives on Eustachian Tube Catheterization

Earlier I wrote about Sir Astley Cooper and his procedure of tympanic membrane perforation as a remedy for deafness. While in Britain there wasn’t tremendous grounds being made in aural surgery, the situation was quite different in France, as surgeons made more advancements in Eustachian tube catheterization as a remedy than their British counterparts.  By the early nineteenth century, the Institut Nationale des Sourds-Muets á Paris emerged as the frontrunner for newer and more experimental surgical methods for treating deafness.

The Institute’s surgeon, Jean-Marc Gaspard Itard (1774-1838) employed an image of deafness based on physiological defect—not of philosophical inquiry into language, as it was in the seventeenth and eighteenth centuries. Within this image, Itard searched for a cure that he hoped would “objectify the disease,” turning to postmortem examinations to draw conclusions about the root cause(s) of deafness. His research suggested that in several instances, congenital deafness arose from material causes that could be surgically removed; as thus, Itard applied his surgical skills towards the Eustachian tube, as a way for surgically treating deafness. Continue reading French Perspectives on Eustachian Tube Catheterization