Easy and Simple FIR Low Pass Filter in Time and Frequency Domain : Part 2 - YouTube
High-pass filtering
Understanding digital filters, specifically their effects on time domain information, how to preserve the waveform of a signal being filtered? | ResearchGate
Lecture 12: Filtering and Convolution. Highpass, bandpass, and notch filters - YouTube
Applications of the Fourier Transform
Time-Domain Signals, Filtering, and the Overlap Problem - ppt download