Silymarin and Related Favonoids Counteract Stress of Simulated Microgravity in the Nematode Caenorhabditis elegans

Speech signal de-noising plays an important role in numerous applications, including speech synthesis, recognition and also a necessary step for speech feature extraction, e.g., pitch track estimation. To acquire an accurate pitch track, the speech signal should have minimum noise interruption. Noise is usually generated by environments or electronic equipments during the recording of the speech signals. In this paper, we investigate several filter design algorithms and apply them on the recorded noisy speech signals. The experiment results show that the presented methods really reduce noise presented in those speech signals.