For pitch detection, AMDF (Average Magnitude Difference Function) is adopted for this work.Compared with the autocorrelation method, AMDF has the advantage of low computation and high precision.

• 中文摘要先前研究显示人机介面之语音互动系统不仅提供了友善的使用者介面也提供了系统一种可回馈使用者反应的机制。