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Prosody is the melody of sounds, which will be produced when an impulse passes through the vocal tract and filtered by it. Changing these series of pulses will change its frequency that results change of pitch. It is this continuous change of the pitch in terms of duration and fundamental frequency that results change of sound prosody. Therefore, prosody manipulation is the changing of these pitches, its duration and some times its amplitudes.

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Demeke Ayele has been born in 1976. He has got his Bsc in Applied Physics in AAU , Ethiopia in 1999 and his Msc in Computer Science in 2007 in AAU, Ethiopia. Currently he is a lecturer in AAU and he is also studying his PhD in Information retrieval and Language technology.

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