Filter Design for Noise Signal Removal

1. Generate a continuous signal containing low, medium, and high frequency components, perform sampling and spectral analysis. Design three types of filters (high-pass, low-pass, and band-pass) to process the signal and observe the spectrum of filtered signals. 2. Acquire a noisy speech signal (either by recording with background noise or adding noise to clean speech), perform sampling and spectral analysis, then design an appropriate filter to eliminate noise based on spectral characteristics.