Hyperacusis and Tinnitus in Cochlear Implant Users

Beyond Hearing: Sound Tolerance in Cochlear Implant Users

When we think of cochlear implants (CIs), the focus is overwhelmingly on restoring access to sound. The primary goals are improving speech understanding and reconnecting individuals to the auditory world. However, a crucial aspect of auditory health is not just hearing sounds, but tolerating them. For individuals with hyperacusis—a condition marked by reduced tolerance to ordinary environmental sounds—everyday noise can be a source of significant distress. New research reveals this issue is far more common in CI users than previously recognized and is intricately linked to their overall auditory experience and quality of life.

Investigating an Overlooked Symptom

A groundbreaking 2026 study by Jahn and Joshi, published in Ear and Hearing, set out to systematically investigate hyperacusis in adults with cochlear implants. Prior research had largely focused on hyperacusis in relation to acoustic hearing, leaving a gap in understanding how it manifests in those who hear via electrical stimulation.

The researchers recruited 40 adult CI users who completed a series of validated online questionnaires. These tools measured:

• Hyperacusis severity: Using the Hyperacusis Questionnaire (HQ).
• Tinnitus severity: Using the Tinnitus Handicap Inventory.
• Subjective hearing abilities: Using the Speech, Spatial, and Qualities of Hearing Scale.
• Listening-related fatigue: Using the Vanderbilt Fatigue Scale.

This multi-faceted approach allowed the team to explore not just prevalence, but the potential relationships between sound tolerance, tinnitus, hearing perception, and the often-debilitating fatigue that can accompany listening effort.

Key Findings: Prevalence and Powerful Correlations

The study’s findings were striking and challenge the assumption that CI users are largely free from sound tolerance issues.

Prevalence: More than half (55%) of participants reported being more sensitive to sound than most people. When categorizing conditions, 35% had both hyperacusis and tinnitus, 20% had hyperacusis alone, and another 20% had tinnitus alone. Only 25% of the cohort reported having neither condition. This highlights that decreased sound tolerance is a major, yet under-discussed, facet of the CI experience.

Even more compelling were the statistical relationships discovered:

• A moderate correlation between hyperacusis and tinnitus severity. As HQ scores worsened, so did tinnitus handicap scores.
• A moderate correlation between hyperacusis and subjective hearing difficulties. Greater sound sensitivity was linked to poorer self-reported hearing abilities in complex situations.
• A strong correlation between hyperacusis and listening-related fatigue. This was the strongest link found, suggesting that the stress of managing uncomfortable sound levels is profoundly exhausting.

In essence, CI users with more severe hyperacusis were more likely to struggle with ringing in their ears, find everyday hearing challenging, and experience significant fatigue from listening.

What This Means for Clinical Practice and CI Users

This research has immediate practical implications. It argues for a paradigm shift in how audiologists and clinicians assess and support cochlear implant recipients. The focus must expand beyond audiograms and word recognition scores to include a holistic assessment of auditory well-being.

1. Routine Screening is Essential: Hyperacusis should be actively screened for during pre- and post-implantation evaluations using standardized tools like the HQ. Recognizing it as a common co-occurrence, similar to the established link between tinnitus, anxiety, and depression, is the first step toward better care.

2. Hyperacusis as a Contributing Factor to “Poor Outcomes”: A patient who is struggling with their CI may not just have a device programming issue or a cognitive challenge. Their difficulties in noisy environments or their reluctance to use the CI could stem from underlying sound tolerance problems. Addressing hyperacusis could be key to unlocking better perceptual outcomes.

3. Informing Therapeutic Approaches: The strong link to fatigue and hearing difficulties suggests that interventions aimed at hyperacusis may have broad benefits. For instance, evidence-based sound therapy for hyperacusis treatment principles, carefully adapted for the CI population, could be explored to help systematically desensitize the auditory system and reduce overall auditory stress. Furthermore, understanding these sensory overlaps can inform broader decreased sound tolerance research trends.

4. Patient Validation and Empowerment: For CI users who experience sound sensitivity, these findings validate their experience. Knowing it is a recognized and common part of the neuro-auditory landscape can reduce isolation and encourage them to seek specific help, rather than dismissing their discomfort.

A Call for Integrated Auditory Care

The study by Jahn and Joshi makes a clear case: auditory rehabilitation is not complete without considering sound tolerance. Cochlear implantation changes the neural auditory pathway, and as research into tinnitus and auditory pathway dysfunction shows, such changes can have wide-ranging effects on perception. The high prevalence of hyperacusis in CI users suggests the condition may be a central feature of altered auditory processing, rather than a peripheral side note.

Future work must focus on developing clinical protocols to quantify and manage hyperacusis in this unique population. By integrating sound tolerance assessment into standard care, clinicians can provide more comprehensive support, ultimately improving not just what a CI user can hear, but how comfortably and sustainably they can live with sound.

Key Takeaways

• Hyperacusis is highly prevalent in cochlear implant users, with over half of the study participants reporting heightened sound sensitivity.
• The severity of hyperacusis is significantly linked to worse tinnitus, greater hearing difficulties, and severe listening-related fatigue, indicating it’s a core factor affecting overall auditory quality of life.
• Clinical practice should evolve to routinely screen for sound tolerance issues in CI candidates and recipients to provide more holistic and effective auditory rehabilitation.
• Validating and addressing hyperacusis could be key to improving patient satisfaction, device use, and reducing the exhausting burden of listening for many CI users.

Source: Jahn KN, Joshi S. Hyperacusis in Cochlear Implant Users and Its Relationship With Tinnitus and Subjective Hearing Abilities. Ear Hear. 2026; PMID: 41876408.