5. An echo suppressor as claimed in claim 3 wherein said fast Fourier transformation means comprises said further sampling means.
5. An echo suppressor as claimed in claim 3 wherein said fast Fourier transformation means comprises said further sampling means. 6. An echo suppressor as claimed in claim 5 wherein said second sampling rate is lower than said first sampling rate by a sampling reduction factor of 80, wherein said first sampling means has a sampling rate of 8 kHz, and wherein said fast Fourier transformation means has a length of 1 to 8 and wherein a number of sub-bands in each of said first and second sets of sub-bands is 24.