Overview of Filters


 A LOW-PASS filter is a filter that sets a frequency, typically referred to as the cutoff frequency or the passband, and keeps all signals lower than the set frequency, and reduces the signals that are higher than the set frequency, which is typically referred to as the stopband. The process of removing unwanted frequencies  allows for a more accurate data set and easier recognition of trends. This process is commonly used to clean up signals, remove noise, perform data averaging, and recognize patterns.

 

A HIGH-PASS or bass-cut filter, is a filter that sets a "cut-off" frequency and keeps all signals higher than the cut-off, the passband, and reduces the signals lower than the cut-off, the stopband. This process is commonly used to "clean up" low frequency noise, remove unnecessary sounds and audio signals, redirect higher frequency signals, and highlights high frequency trends by removing low frequency trends.







Sources:
https://www.mathworks.com/discovery/low-pass-filter.html
https://www.mathworks.com/discovery/high-pass-filter.html


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