Misophonia and Hyperacusis Sound Sensitivity Study

A new study of young adults who report sensitivity to everyday sounds reveals that less than a third meet the objective audiological criteria for hyperacusis. The research, published in the *International Journal of Audiology*, finds that this hyperacusis group is significantly more likely to also have symptoms of misophonia, pointing to a substantial overlap between these two forms of decreased sound tolerance.

Who Truly Has Hyperacusis? Defining the Line

Researchers led by Ahmad Rasouli and colleagues from Tehran University of Medical Sciences set out to clarify the relationship between self-reported sound sensitivity, objective hyperacusis, and misophonia. They recruited 153 participants, aged 19 to 31, all with normal hearing and no tinnitus, who identified as sensitive to environmental sounds.

The team used a clear, audiological benchmark to define hyperacusis: an Uncomfortable Loudness Level minimum (ULLmin) of 77 decibels Hearing Level (dB HL) or lower across four frequencies. The ULL test determines the softest level of a tone a person finds uncomfortably loud. Participants with ULLmin above 77 dB HL were classified as not having hyperacusis. This objective measure was then compared to the participants’ subjective reports of distress and sensitivity.

Clear Audiological and Symptom Differences Emerge

The results showed a distinct split. Only 31.4% of the sound-sensitive cohort actually met the objective criterion for hyperacusis. This group, as expected, had significantly lower ULLs. They also displayed steeper ULL “slopes,” meaning their discomfort increased more rapidly as sound volume rose compared to the non-hyperacusis group.

Critically, the hyperacusis group scored much higher on standardized questionnaires for hyperacusis (the HQ), general sound sensitivity (SSSQ), and misophonia (MQ-MSS). When the researchers applied screening thresholds for misophonia, the contrast was stark: 52.1% of the hyperacusis group screened positive for misophonia symptoms, compared to 32.4% of the non-hyperacusis group. This represents a statistically significant difference, confirmed by a multivariable analysis that identified hyperacusis status as the single strongest predictor of misophonia.

Implications for Diagnosis and Understanding

These findings have direct practical implications. The fact that over two-thirds of self-identified sound-sensitive individuals did not have objective hyperacusis underscores the importance of clinical ULL testing. Relying solely on subjective complaint can lead to mislabeling. The strong overlap with misophonia, particularly in the hyperacusis group, suggests these conditions may share underlying auditory pathway dysfunctions, while also having distinct psychological components—misophonia is often triggered by specific, pattern-based sounds like chewing or breathing.

“The higher prevalence of misophonia symptoms in hyperacusis and their shared audiological correlates suggest substantial overlap between decreased sound tolerance subtypes,” the authors concluded. This supports a clinical model where assessment integrates both the “hardware” check of the auditory system (ULLs) and the “software” evaluation of emotional and behavioral responses (questionnaires). For a deeper look at the distinct brain activity in these conditions, see our article on Brain Responses to Sounds in Misophonia vs. Hyperacusis.

Moving Toward Integrated Assessment and Future Research

The study makes a strong case for a more nuanced diagnostic framework. For clinicians, the message is to measure ULLs routinely when patients report sound sensitivity. This objective data can differentiate true loudness hyperacusis from other forms of sound intolerance, such as misophonia or phonophobia, which may require different management strategies.

The observed link also opens important research questions. Do hyperacusis and misophonia develop from a common neurological origin? Does one condition predispose an individual to the other? Rasouli’s team explicitly calls for longitudinal studies to track symptom development and neuroimaging studies to identify the shared and distinct neural networks involved. Understanding these mechanisms could lead to more targeted therapies. For instance, some emerging sound-based therapies are explored in our piece on AI Music Therapy for Tinnitus and Hearing Disorders.

Ultimately, this research helps move the field beyond broad labels like “sound sensitivity.” By identifying objective audiological profiles and their correlation with specific symptom patterns, it enables more precise diagnosis and paves the way for personalized treatment approaches for the complex spectrum of decreased sound tolerance.

Source: Rasouli A, Rahimi V, Fatahi F, et al. A comparison of misophonia proportion and patterns of uncomfortable loudness levels between individuals with and without hyperacusis reporting sensitivity to environmental sounds. Int J Audiol. 2026;1-12. doi:10.1080/14992027.2026.2642751. PMID: 42057697.