T. RajeshKumar, M. Srinagamani, M. Sai ram chandu, and S. Mounika, “Conversion of Body Conducted Unvoiced Speech(Murmur) to Normal Speech Using Hidden Markov Model (HMM)”, IJET, vol. 7, no. 2.32, pp. 400–404, May 2018, doi: 10.14419/ijet.v7i2.32.15723.