Characterization of the Acoustic Reflex Latency Test in Adults with Normal Hearing

Abstract

Objective: There are a limited number of studies on Acoustic reflex latency (ARL) test in the literature. In this study, we aimed to examine the ARL test results and parameters in young adults in Türkiye and evaluate the difference in interaural latency. Materials and Methods: A total of 50 individuals with normal-hearing thresholds, 25 females and 25 males, between the ages of 18 and 35 years were included in the study. Parameters of ARL; 10% – on latency, 90% – on latency, 10% – off latency, and 90% – off latency were recorded and analyzed in 500, 1000, 2000, and 4000 Hz frequencies. Study results were compared between ears and genders. Results: When comparing the right and left ears, ARL parameter values of men and women, 90% on and 10% off latency on the right and 90% on latency on the left ear, were found to be longer in women only at a frequency of 4000 Hz. At 500, 1000, and 2000 frequencies, no significant difference was observed between the genders. There was no interaural difference of ARL. As the frequency increased, it was observed that the ARL onset latencies were prolonged in both men and women. Conclusion: Our study indicated that there was no interaural difference of ARL in normal-hearing subjects. İnteraural difference of ARL may provide diagnostic information clinically.