What are 3 different types of filtering?

Three different types of filtering include:

1. Low-pass filtering: This allows signals with a frequency lower than a certain cutoff frequency to pass through while attenuating higher frequencies, commonly used in audio processing.
2. High-pass filtering: This permits signals with frequencies higher than a specified cutoff frequency to pass, effectively blocking lower frequencies, often utilized in image processing to enhance edges.
3. Band-pass filtering: This combines both low-pass and high-pass filtering, allowing only a specific range of frequencies to pass through, frequently applied in communication systems to isolate desired signals from noise.