Objectives: To determine the frequency of HA in relation to age groups, to investigate whether there are differences between otoscopy and tympanometry findings between age groups and gender. To investigate whether there is a correlation between otoscopy and tympanometry findings in all subjects and in relation to age groups and gender, and to examine which symptoms correlate best with otoscopy and tympanometry findings. Patients and methods: The respondents are children from two to twelve years of age who were examined in the children's ENT clinic in the period from January 1, 2022 to January 1, 2024 due to symptoms of HA. The materials are specialist findings from the ENT clinic and tympanometry findings. Specialist findings include otoscopy, rhinoscopy and oropharyngoscopy status. Results: The average age of boys was 6.026 ± 2.62 years, and girls 5.47 ± 2.49 years, so the T-test did not confirm a statistically significant difference in age between the groups (P=0.100). Also, statistical analysis did not find any difference (P=0.925) between the groups observing gender and otoscopy findings. We proved that no difference was found (P=0.608) between the groups either when observing gender and the otoscopy finding of a possible effusion in the tympanic membrane, while we found a statistically significant difference (P=0.010) between the groups when observing age and the otoscopy finding of a retracted tympanic membrane. Out of 140 subjects, 87 had rhinorrhea, and 53 did not. Snoring occurred in 92 children, and difficulty breathing through the nose was the most common symptom and occurred in 117 subjects. Frequent ear infections occurred in 69 subjects, and impaired hearing was a problem in 26 subjects. OSA occurred in 15 subjects and was the rarest symptom. It was also shown that in younger subjects, the finding of a retracted tympanic membrane itself is much more common than in older subjects. Statistical analysis showed the best correlation with symptoms in the case of suspected effusion in otoscopy and type B curve. Conclusion: Most children with HA symptoms have an otoscopy finding of a cloudy tympanic membrane. In children of the younger age group, there are significantly more pathological findings of tympanometry compared to the older age group. Otoscopy findings and tympanometry findings show a good correlation. Statistical analysis showed the best correlation with symptoms in case of suspected effusion in otoscopy and type B curve.