Abstract: The present echo canceller utilizes the principle that the spectrum pattern of human speech does not change much in the short run. The inputs to the present echo canceller are x(t) and y(t), y(t) representing the incoming speech signal from a far-end speaker and x(t) representing the combination of speech signal from a near-end speaker and the echo. The processed forms of the input x(t) and y(t) are processed by applying the well-known Hanning window. They are then transformed into their respective frequency domain using the well-known fast Fourier transform (FFT), and the power spectrum Px and Py are calculated where Px=|xr(f)|+|xi(f)|+&egr;*|xr(f)|*|xi(f)| and Py=|yr(f)|+|yi(f)|+&egr;*|yr(f)|*|yi(f)| where &egr; is a scaling factor which controls the amount of echo to be suppressed, and converting Px and Py to bark scales Px(b) and Py(b).