How Hearing Aid Technology Has Evolved in Society, and Why — Part V

Hearing Health & Technology Matters
June 7, 2016

Editor’s Note: Today’s post continues the discussion by Abigail Farmer and Bruno Sarda on the evolution of hearing aid technology . 


A more recent development introduced in 2003, the Receiver-in-Canal (RIC) hearing aid, has proven disruptive to the modern hearing aid market. This innovation has taken Behind-the-Ear (BTE) hearing aids from about 15% market penetration in 2003 to about 50% in 2014.1

There are many more innovations that could be discussed here but for the lack of space. One such innovation, whose history is rich and controversial enough to fill many pages on its own, is the cochlear implant. This technology is aimed at a more severely hearing-impaired market and likely displaces sign language more than the traditional hearing aid, plus it relies on a different set of scientific principles than hearing aids. For this reason, we are excluding this technology from the scope of our inquiry.


Eveready® introduced the first miniature batteries for hearing aids in 1955. Image courtesy Energizer

As mentioned throughout, a critical technology that evolved in parallel with—along the way influencing and being influenced by—hearing aids was battery technology, for which key milestones were the introduction of the zinc carbon battery in 1866, Thomas Edison’s alkaline battery in 1901 and the mercury battery in 1940, followed by the development of cells starting with the mercury cell in 1947 and the alkaline cell in 1949, to the silver-oxide cell in 1960 which yielded much more power, followed by rechargeable Nickel-Cadmium cells in 1970.

The latest advances for hearing aids include mercury-free zinc-air cells along with nickel-metal hybrid cells both introduced in 2008.

An important policy that had a significant impact on batteries took effect during WWII when the War Production Board mandated that batteries could only be produced in certain standardized sizes.3 Prior to that, batteries came in unique sizes, which made it cumbersome and expensive to buy replacements, which impacted hearing aid users more than most civilians.

Innovation in battery technology has been directly linked to innovation in, and resulting adoption of, hearing aids. In fact, Eric Hintz argued that the “button” mercury battery not only preceded the transistor but “was just as important, if not more so, for the progress of miniaturization”.4

As evidenced by this rich history, it is clear that the possibility of enhancing human hearing inspired many gifted inventors, scientists and engineers, and that the history of hearing aid development is closely intertwined with the development of some of the most significant innovations of the first half of the 20th century.

As science historian Mara Mills aptly concludes, “hearing aids, particularly in their evolution as “small telephone systems” in the 20th century, provided a site for the development and testing of miniaturized components and assembly techniques as early as 1900.”5 She further advances that it is therefore difficult to understand “the obduracy of the stigma that adheres to the technology itself—when hearing aids have otherwise represented the leading edge of personal electronics.”The next section explores explore this stigma and the broader socio-cultural context that helps explain it.


Socio-Cultural Context


“We have learned that technologies emerge from social systems, that they reflect and internalize power relations and cultural assumptions. We recognize that social systems are actually techno-social systems” – Sarewitz, Technology in the Culture of Progress             


A good deal of our society is premised on everyone’s having full hearing. Movie theaters do not show movies with same-language subtitles, most warnings are delivered via sirens, and family dynamics, difficult to navigate on their own, are made even more complex when not all parties have full hearing abilities.This reality makes hearing loss a sensitive topic for many.

Societal Expectations and Hearing Aid Technology

Because the success of the hearing aid market depends on user acceptance, societal attitudes toward hearing loss and expectations of hearing aid technology are key drivers of hearing aid innovation.


Stigma Surrounding Hearing Loss

Modern society has a problem with imperfection. It is not enough to correct a problem; the solution must be elegant and invisible. Eyesight is corrected with lasers, not coke-bottle glasses.

Celebrities get plastic surgery to shrink noses and zap wrinkles—and then deny having had the surgeries. Even dental braces have gone invisible. Society has come to expect a “fix” for everything.

Hearing loss, however, is associated with an interesting mix of refusal to acknowledge its existence and an insistence on invisibility. This is not to say that hearing loss is an isolated problem: around seventeen percent of American adults report some form of hearing loss, while nearly half of individuals over seventy-five have hearing loss.7 And yet, only twenty percent of individuals who would benefit from a hearing aid actually own one—and even then, they do not always wear their hearing aids.8 Even more surprising, of those individuals who do seek hearing aids, most lived with their hearing loss for more than ten years before seeking treatment.9

This hesitance to seek treatment is less surprising when viewed in light of the stigma surrounding hearing loss. Indeed, the perceived stigma impacts an individual’s willingness to be tested or seek treatment for hearing loss, let alone the kind of hearing aid an individual will use,10 along with when and where.11

The stigma takes three main forms, all of which relate to each other in some measure: alteration in self-perception, ageism, and vanity.12

Changes in self-perception relates not only to how individuals with hearing loss view themselves, but how they believe others will view them.13 Unlike vision problems, which can be corrected with eyeglasses, individuals view admitting to having hearing loss as changing their identity from whole to not-whole, able to disabled, and even smart to cognitively impaired.14 As a result, individuals will often fake hearing, sometimes with embarrassing results.15

*Stay tuned for Part 6: Stigma and Changing Hearing Aid User Demographics; title image courtesy NU



  1. Wayne Staab, Hearing Aid Technology Evolution III, Hearing Health & Tech. Matters, (April 27, 2014),
  2. Wayne Staab, Hearing Aid Technology Evolution II, Hearing Health & Tech. Matters (April 21, 2014),
  3. Id.
  4. E.S. Hintz, Portable Power: Inventor Samuel Ruben and the birth of Duracell,50 Technology and Culture, Jan. 2009, at 24-57. Again, the history and development of batteries is top enough for another paper; it is beyond the scope of this one.
  5. Mills, supra note 16.
  6. Id.
  7. Hearing Aids, NIH Research Portfolio Online Reporting Tools (Mar. 29, 2013), available at This number would probably increase if individual’s primary communication partner (usually the spouse) were polled.
  8. Id.
  9. Id.
  10. Margaret I. Wallhagen, The Stigma of Hearing Loss, 50 Gerontologist 66, 66 (2010), available at
  11. Id. at 66.
  12. Id. at 68.
  13. Id.
  14. Id.
  15. Id. at 68–69.


Abigail Farmer graduated summa cum laude with B.A.s in French and Spanish from Texas A&M University. Before starting law school, she interned with the U.S. Commercial Service in Paris, France. Abigail served as Executive Note and Comment Editor for the Arizona State Law Journal from 2014–2015 and as the Hong Kong team editor for the Wilhem C. Vis International Commercial Arbitration Moot from 2015–2016. She also co-authored an article on bitcoins and estate planning, which won the Mary Moers Wenig Student Writing Competition and was published in the ACTEC Law Journal; she and her co-author presented the article at the Arizona State Bar Convention. Abigail is graduating summa cum laude with a J.D. from the Sandra Day O’Connor College of Law and with an M.B.A. from the W.P. Carey School of Business. After graduation, Abigail will join Shell’s legal department in Houston, Texas

sardaBruno Sarda is a leading practitioner in the field of corporate sustainability at Dell, where he’s worked since 2005. In his role as Director of Social Responsibility, he leads the company’s strategy on social aspects of sustainability, including human rights and labor practices, working with internal and external stakeholders. He also manages Dell’s groundbreaking partnership with Phoenix-based TGen (Translational Genomics Research Institute) to accelerate adoption of precision medicine in addressing childhood cancer. In addition, Sarda is an adjunct faculty member and Senior Sustainability Scholar at Arizona State University, where he teaches and helped design and launch the Executive Master’s for Sustainability Leadership working with the Rob and Melani Walton Sustainability Solutions Initiatives at ASU.

  1. Innovations in technology have surely helped in upgrading the hearing aid mechanisms. The size and the cost of the hearing aid have both reduced drastically. Now, even common people can afford hearing aids.

Leave a Reply