這篇論文提出了一個在網路電話上處理回音消除的架構，並考量到雙邊通話提出了改進的演算法。-a model for electrical echo in

telephone networks for varied echo-path delay was

designed. This was with a view to implementing an

adaptive electrical echo canceller based on a

combination of the Normalized Least Mean Square

(NLMS) and Geigel speech detector algorithms (GSD).