(a) What sources of error can arise if the block length and the sampling frequency are not in an integer relationship to each other?
(b) Cut out from a longer speech signal a short segment, for example, of 0.07s in length and limit the bandwidth of this segment on account of the sampling principle. Analyze the frequency domain of this signal with different sampling rates and block lengths. Discuss the differences in the spectral representations. Which of these clearly show errors? What is behind this?