Clinical and electrophysiological instruments in the assessment of hyperacusis: a scoping review

Purpose: The primary purpose of this scoping review is to map and synthesize the clinical, electrophysiological, and behavioral instruments used to assess hyperacusis in both children and adults. Auditory hypersensitivity significantly impacts quality of life, particularly in populations like those with Autism Spectrum Disorder (ASD), yet there is a lack of comprehensive synthesis regarding the main tests used for its evaluation. This study aims to fill that gap by identifying which tools are currently evidenced in the scientific literature, providing a clear overview of how hyperacusis is diagnosed and monitored. Methodology Overview: Following the JBI Manual for Evidence Synthesis and PRISMA-ScR guidelines, this review will employ a systematic search strategy across nine major databases, including MEDLINE, Scopus, and Web of Science, as well as grey literature. The study selection involves a rigorous three-stage screening process (calibration, title/abstract screening, and full-text review) conducted by independent reviewers. Data extraction will focus on study characteristics, participant demographics, specific types of instruments (such as ABR, LDL, and self-assessment questionnaires), and key conclusions. Expected Outcomes: Comprehensive Mapping: A detailed identification and description of the most frequent behavioral and electrophysiological tests used in clinical and research settings. Population Insights: A clear distinction between assessment tools applied to children versus adults, including those with associated conditions like ASD. Scientometric Trends: If the study includes 50 or more primary sources, a scientometric analysis will be provided to characterize publication trends, geographical distribution, and institutional collaborations in the field of hyperacusis. Knowledge Gap Identification: The review will highlight existing gaps in the literature, guiding future research toward more standardized and effective diagnostic protocols.