Sarkar, Mita, Ashok Kumar Sinha, and Nachiketa Rout. “Effect of Vents on the Output of Hearing Aids”. Bangladesh Journal of Otorhinolaryngology 18, no. 1 (April 21, 2012): 59–62. Accessed September 10, 2025. https://www.banglajol.info/index.php/BJO/article/view/10420.