Misophonia vs Hyperacusis: Sound Sensitivity Study

A new study comparing sound sensitivity in young adults with normal hearing finds that just one-third of individuals who self-report the problem meet the objective clinical criteria for hyperacusis. This 2026 research also reveals a significant overlap: over half of those with objective hyperacusis also screened positive for misophonia, suggesting these conditions often co-occur and share underlying mechanisms.

Objective Testing Reveals Who Has Hyperacusis

Researchers from Tehran University of Medical Sciences and London’s Hashir Institute recruited 153 participants aged 19-31 via social media. All reported sensitivity to environmental sounds but had no tinnitus. The team, led by Ahmad Rasouli and Vida Rahimi, used a key objective measure to classify hyperacusis: the Uncomfortable Loudness Level minimum (ULLmin). This test determines the softest level at which sounds become uncomfortable across frequencies. Participants with a ULLmin of 77 decibels hearing level (dB HL) or lower were placed in the hyperacusis group; those with higher thresholds were in the non-hyperacusis group.

Only 31.4% of the sound-sensitive cohort met this objective hyperacusis criterion. “Many individuals reporting sound sensitivity did not meet objective criteria for hyperacusis,” the authors noted, highlighting the gap between subjective complaint and clinical diagnosis. This finding underscores the value of ULL testing in a clinical setting to understand the physical auditory component of a patient’s distress.

Hyperacusis Strongly Predicts Misophonia Symptoms

The team then screened for misophonia using two tools: a specific item from the Sound Sensitivity Symptoms Questionnaire (SSSQ) and the Misophonia Questionnaire Severity Scale (MQ-MSS). The results showed a clear link between the two conditions. In the hyperacusis group, 52.1% screened positive for significant misophonia symptoms. In the non-hyperacusis group, the rate was 32.4%.

Statistical modeling confirmed that hyperacusis status was the single strongest predictor for having misophonia. Specific ULL patterns—a lower minimum level and a steeper slope from low to high frequencies—also contributed to the model. The hyperacusis group consistently scored higher on questionnaires for hyperacusis, general sound sensitivity, and misophonia severity.

This data points to a substantial overlap in the audiological profiles of these conditions. It suggests that for many, the physical intolerance of loudness (hyperacusis) and the strong emotional reaction to specific trigger sounds (misophonia) are not separate issues, but rather interconnected aspects of decreased sound tolerance. This aligns with findings from a related fMRI study on neural responses in these populations.

Clinical Implications: Integrated Assessment Is Essential

The study has direct implications for clinical practice. A patient presenting with “sound sensitivity” requires a nuanced evaluation. Relying solely on self-report can lead to misclassification, while focusing only on ULLs might miss significant emotional components.

The researchers advocate for an integrated assessment that combines objective audiological measures (like ULLmin and slope) with validated psychometric questionnaires for hyperacusis and misophonia. This dual approach can better identify the primary driver of a patient’s distress—be it loudness intolerance, specific trigger sounds, or both—and guide appropriate management strategies.

For instance, a patient with normal ULLs but high misophonia scores may benefit more from cognitive or behavioral interventions targeting emotional reactivity, similar to approaches discussed in our article on the link between adverse childhood, empathy, and misophonia. Conversely, a patient with very low ULLs might first need sound therapy to gradually increase their tolerance to volume, a principle also used in sound exposure therapy for PTSD.

Future Directions: From Patterns to Mechanisms

Rasouli, Rahimi, and co-authors state that their cross-sectional findings highlight the need for longitudinal and neuroimaging studies. Future research must track how these audiological and psychological profiles change over time and in response to treatment. Neuroimaging can help determine if the observed overlap in symptoms stems from shared neural pathways or distinct brain regions that are commonly co-activated.

Understanding these mechanisms is a critical step toward developing more precise treatments. It moves the field beyond a one-size-fits-all approach to sound sensitivity and toward personalized interventions based on an individual’s specific auditory and emotional profile.

The full study, “A comparison of misophonia proportion and patterns of uncomfortable loudness levels between individuals with and without hyperacusis reporting sensitivity to environmental sounds,” is available online ahead of print in the International Journal of Audiology (DOI: 10.1080/14992027.2026.2642751, PMID: 42057697).