Abbas Abdulzahra Al- Saedl, G. and Majld Bachay Al- Behadily, J. 2020. Engineering of nun of Surat Al – Rahman the sound of ‘nun’as a model . International Journal of Psychosocial Rehabilitation. 24, 3 (May 2020), 6441–6446. DOI:https://doi.org/10.61841/5p2wj754.