Raghavachari, Ramya, and Moorthi Sridharan. “Modeling and Simulation of Frequency Response Masking FIR Filter Bank Using Approximate Multiplier for Hearing Aid Application”. Advances in Systems Science and Applications 18, no. 4 (December 28, 2018): 74-91. Accessed April 26, 2019. https://ijassa.ipu.ru/index.php/ijassa/article/view/617.