Key Techniques and Challenges for Processing of Heart Sound Signals. - Sheikh Hussain Shaikh Salleh; Fuad M. Noman; Chee-Ming Ting; Syed Rasul Bin G. Syed Hamid; Siti Hadrina Bt Sheikh Hussain; Muhammad Arif Jalil; Ahmad Zubaidi Abdul Latif; Kavikumar Jacob; Kanad Ray; M. Shamim Kaiser; Jalil Ali (AII, 2021)