Introduction:The occurrence of high-frequency hearing loss(HFHL) can be difficult to detect. Children with HFHL may not exhibit typical symptoms, such as a lack of response to environmental sounds or difficulties in speech comprehension.The unawareness of the emergence of symptoms of hearing loss in the HF range may be attributed to other factors.This oversight prolongs and complicates the accurate diagnosis and timely initiation of hearing care.The aim of this study was to evaluate the audiological findings in a cohort of children with suspected hearing loss to demonstrate that HFHL can be underdiagnosed. Methods: A variety of hearing tests were conducted in 2023-2024 at the Department of Phoniatrics and Audiology, Poznan University of Medical Sciences. A total of 17 children with HFHL, aged up to 10 years, were selected from among the 208 patients examined.We performed otoacoustic emissions (DPOAE),impedance audiometry,auditory brainstem evoked potential (BAEP) tests, and behavioral assessments. A statistical analysis was also carried out. Results:In 8.2%(17/208) of patients, the initial audiological results indicated the potential for an erroneous estimation of the hearing threshold. Routine tests had to be extended: BAEP testing was conducted at frequencies specific to 4kHz (and 6-8kHz in selected cases),and OAE testing was performed at frequencies up to 12kHz.Discussion:The objective hearing tests enable the determination of hearing thresholds across specific frequency ranges. By expanding the range of frequencies tested, it becomes possible to detect HFHL.This approach aims to enhance the early diagnosis of HFHL.Recognizing the significance of diagnosing HFHL in children is essential for providing appropriate hearing care and supporting optimal speech development.

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