Simplified frequency selectivity measure as a potential candidate for hearing screening: changes with masker level and test-retest reliability of self-administered testing

ObjectivesThis two-part pilot study investigated the feasibility of using a frequency selectivity measure (TFS) to develop a novel hearing screening test for cooperative adults. Study 1 determined the optimal masker level, while Study 2 assessed the reliability of a self-administered TFS test prototype performed at the selected masker level.Design and study sampleStudy 1 (normal hearing, n = 20) examined masker-level effects on TFS using a manual threshold determination method from an earlier study. Study 2 (normal hearing, n = 21; hearing loss, n = 5) evaluated the reliability of a self-administered TFS test using a new automated threshold determination procedure.ResultsModerate masker levels (30-40 dB SPL) were suitable for the TFS measurements, with 40 dB SPL being optimal. Lower level (20 dB SPL) led to floor effects, while higher level (50 dB SPL) broadened cochlear tuning and reduced TFS values. The self-administered test demonstrated +/- 9 dB limit of agreement, with intra-subject absolute mean differences of 1.8-2.7 dB across test frequencies, indicating greater variability compared to the manual method.ConclusionsThe self-administered TFS test is a candidate for hearing screening, particularly for mild sensorineural hearing loss. However, further research is needed to reduce measurement variability and optimise testing for real-world use.