Survey of 378 Adults with Single-Sided Hearing Loss Shows How Background Noise Disrupts Health Care Visits

A Japanese questionnaire study finds that people with unilateral hearing loss struggle to communicate in noisy dental settings and identifies simple adjustments, from reduced background noise to speaking on the hearing side, that make care more accessible.

Unilateral hearing loss, sometimes called single-sided hearing loss, is easy to underestimate. A person with one normally hearing ear can pass casual conversation without obvious trouble, so friends, colleagues and even health professionals may assume there is no problem to accommodate.

The reality is different in noisy places. Hearing with two ears is what lets the brain locate sounds and separate speech from background noise, and a dental office, with its drills, suction and ambient chatter, is one of the noisiest health care settings a patient routinely encounters. A new study set out to document exactly what people with unilateral hearing loss experience there.

Background: Why the Researchers Looked at This

Unilateral hearing loss means significant hearing impairment in one ear alongside normal or near-normal hearing in the other. Because the better ear carries conversation in quiet settings, the condition often goes unrecognized by others, and its everyday burden has received far less research attention than bilateral hearing loss.

The research team focused on dental care because it combines several difficult conditions at once: sustained background noise from equipment, providers who wear masks that block lip reading, and a patient who is reclined and often unable to turn the better ear toward the speaker. Understanding what patients need in this setting could inform accommodations across health care more broadly.

Until now, providers have had little published guidance describing what patients with single-sided hearing loss actually find helpful during appointments.

How the Study Was Done

The researchers ran a web-based survey through the official website of Kikoiro, a Japanese community organization for people with unilateral hearing loss. Participation was voluntary, and the survey's purpose and target population were clearly stated on the site.

Respondents qualified if they had normal hearing in one ear and hearing loss in the other ranging from 25 decibels of hearing level to complete deafness. People with hearing loss in both ears were excluded, as were family members answering on someone else's behalf. In total, 378 individuals with unilateral hearing loss completed the questionnaire, a large sample for a condition this specific.

What the Researchers Found

Many of the 378 respondents reported difficulty communicating in the noisy dental environment. The combination of equipment noise and speech coming from the wrong side turned routine exchanges, such as instructions during treatment or explanations of findings, into a strain.

When asked what actually helps, participants pointed to a consistent set of adaptations. Clear and slow speech ranked prominently, as did reducing background noise during conversation. Speaking from the patient's hearing side was another key request, one that costs a provider nothing once they know which side to use.

Visual supports also mattered. Respondents valued visual cues during interaction, and they described visual aids and written explanations before and after treatment as helpful for making sure nothing important was missed.

The authors conclude that consideration of patient hearing ability is essential in dental settings, and that improving the communication environment benefits not only patients with unilateral hearing loss but contributes to more inclusive care overall.

What It Means for People with Hearing Loss

The findings put numbers and specifics behind something many people with hearing loss know from experience: the hardest listening situations are not quiet conversations but noisy rooms where speech comes from unpredictable directions. That applies well beyond the dental chair, to pharmacies, waiting rooms, restaurants and family gatherings.

The study also offers a practical script for self-advocacy. Telling a provider which side is the hearing side, asking for reduced background noise during conversation, and requesting written summaries are all evidence-backed accommodations that patients can reasonably request at any appointment.

For providers, the message is that small environmental changes carry real weight. None of the top adaptations identified by respondents require special equipment, only awareness.

When Background Noise Is the Barrier

Because this survey identifies background noise as the central obstacle to communication, it highlights why noise handling has become the focus of modern hearing technology. For adults with mild to moderate hearing loss in the affected ear, FDA-OTC hearing aids now build in processing aimed specifically at separating speech from surrounding sound.

Panda Quantum is one such device, a 16-channel receiver-in-canal hearing aid with adaptive noise reduction designed for clearer speech in noisy environments, the kind of speech-in-noise support that settings like a busy clinic demand. It runs 20 hours per charge with a case that adds three more full charges for 80 hours total, and an optional app can run an optional in-ear hearing test to personalize the sound, though the device works fully without either.

A caveat applies here: OTC hearing aids are approved for adults with mild to moderate hearing loss, and unilateral hearing loss can involve anything up to complete deafness on one side. Anyone with severe or profound loss, or sudden or unexplained hearing changes, should start with a clinical evaluation. Details on Panda Quantum are at pandahearing.com.

Limitations of This Research

This was a voluntary web survey recruited through a single community organization, so respondents may be more engaged with their hearing loss than the average person with the condition, and the findings reflect the Japanese dental care context. Self-reported hearing status was not audiometrically verified. The results describe experiences and preferences rather than measuring the effect of any specific accommodation.

What to Do With This

If you or someone you care for has hearing loss in one ear, this study is a reminder that naming the need is worthwhile: which side to speak to, how much noise to turn down, what to put in writing. The accommodations that 378 respondents asked for are simple, free and available at any appointment, but only if the people in the room know to offer them.

Murakami J, Okano Y, Oda Y. Unilateral Hearing Loss and Dental Care: A Questionnaire Survey of Patient Challenges and Provider Responses. Special Care in Dentistry. 2026. Retrieved from PubMed. https://doi.org/10.1111/scd.70264