A mobile hearing screening tool for Turkish: Validation and test-retest reliability of the digit-in-noise test

ObjectiveThe present study aims to establish normative data for the Turkish mobile digit-in-noise test. The main objectives are to provide a reliable hearing screening tool for clinical, educational, and research purposes and to investigate its relationship with socio-demographic factors.MethodsThe study included 353 participants with normal hearing, aged 12 to 60 years. The mobile Turkish Digit-in-Noise (T-DIN) test, developed for the Android operating system, was administered using a Samsung Galaxy S10 smartphone paired with the original earbuds. To assess the reliability of the mobile T-DIN test application, it was re-administered to 172 participants under similar test conditions after a 15-day interval.ResultsThe Spearman correlation analysis yielded a coefficient of 0.754, while the intraclass correlation coefficient was calculated as 0.431. Normalization values for the assay were set at a signal-to-noise ratio of -7.05 ± 0.84. A statistically significant difference in mobile T-DIN SNR values was observed based on the age of the participants.ConclusionThe mobile T-DIN test is a suitable tool for hearing screening in individuals aged 12-60 years and provides a practical and reliable method for assessing auditory function.