Tehran University of Medical Sciences Auditory and Vestibular Research 2423-480X 31 1 2022 01 01 38 44 EN Parisa Rasouli Fard Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Farnoush Jarollahi Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Seyyed Jalal Sameni Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Mohammad Kamali Department of Rehabilitation Management, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran 2021 06 30 2021 08 10 Background and Aim: The incidence of noise-induced hearing loss (NIHL) is increasing rapidly worldwide. It has been shown that the long-term exposure to noise leads to permanent hearing loss. There is currently no treatment for NIHL and it is mainly managed by preventive measures. This study aimed to develop a training software to improve speech-in-noise (SIN) perception in the elderly suffering from mild-to-moderate NIHL due to temporal fine structure (TFS) damage. Methods: This is a non-randomized clinical trial conducted on 8 older men aged 60-75 years (Mean age = 68 ± 4.5 years) with mild-to-moderate NIHL at high frequencies (43.75±6.0 dB HL) with at least for five years of work in noisy environment. They received rehabilitation using a researcher-developed training software targeted TFS for five weeks. To assess the efficiency of the training software, the signal-to-noise ratio for 50% correct scores (SNR-50%) was calculated using the word-in-noise test before and after the trial. Results: The SNR-50% improved significantly in all participants from 13±2.63 dB to 6.10±2.85 dB (p<0.001). In the multiple linear regression model, the rehabilitation by the training software predicted 68% of improvement in SNR-50% (coefficient of determination=0.676). Conclusion: Rehabilitation by the training software developed based on TFS can improve SIN perception in the elderly with NIHL. https://avr.tums.ac.ir/index.php/avr/article/view/972 https://avr.tums.ac.ir/index.php/avr/article/download/972/438