High-pass, low-pass, and notch filters each remove specific unwanted signal components
Evidence
One of the simplest forms of electronic signal processing is to filter the signal in order to remove unwanted components. For example, often low-frequency noises, such as ventilation and traffic rumble, need to be removed from the signal picked up by the microphone. A high-pass filter would accomplish this, and mixing desks often provide some form of high-pass filtering for this reason. High frequencies also often need to be removed to either ameliorate the effects of noise and distortion or remove the high-frequency components that would cause alias distortion in digital systems. This is achieved via the use of a low-pass filter. A third type of filter is the notch filter, which is often used to remove tonal interference from signals. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2406
Categorization
- DEFINE: Names and distinguishes the three basic filter types (high-pass, low-pass, notch) by their target interference.