Tehran University of Medical Sciences Auditory and Vestibular Research 2423-480X 23 3 2017 07 31 13 21 Mohsen Ahadi Department of Audiology, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Akram Pourbakht Department of Audiology, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran AND Rehabilitation Research Center, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Amir Homayoun Jafari Department of Medical Physics and Biomedical Engineering, School of Medicine, Tehran University of Medical Sciences, Iran AND Research Center for Biomedical Technology and Robotics. Tehran University of Medical Sciences, Iran Zahra Shirjian Department of Medical Physics and Biomedical Engineering, School of Medicine, Tehran University of Medical Sciences, Iran Amir Salar Jafarpisheh Research Center for Biomedical Technology and Robotics. Tehran University of Medical Sciences, Iran 2017 05 21 Background and Aim: Speech-evoked auditory brainstem responses were used in the assessment of subcortical encoding of the speech stimuli in the English language. These processes are affected by language background and experiences. Considering the language specific acoustic differences, the aim of current study was establishing the response norms in adult Persian-speakers and comparing the encoding of the speech syllable /da/ between Persian and English languages. Methods: Auditory brainstem responses to speech syllable /da/ in the right ear, gained from 48 normal adults (25 women and 23 men) with the mean age of 22.70 with SD 2.05 years were recorded. After characterizing the onset elements, transition from consonant to vowel, the periodic portion and offset of response, the Persian dataset were compared with 95% confidence interval norms in the age range of 18-28 years. Results: The response to speech syllable /da/ was successfully recorded in all of the subjects and main features of response were highly overlapped with published English norms. Conclusion: Normative values for speech-evoked auditory brainstem responses in adult Persian speakers are presented in the current survey. Our findings suggest that the recommended procedure and more importantly, the scoring method based on English norms can be used in Persian speakers without replacing the original synthetic vowel /da/. https://avr.tums.ac.ir/index.php/avr/article/view/239