Low pass, High pass, Band pass and Band stop filters explained – Mixed Signals

Video

https://www.youtube.com/watch?v=RAhcsDwp7iA

Summary

### Summary
A low-pass filter passes frequencies below the cutoff frequency, attenuating those above it. High-pass filters do the opposite, passing frequencies above their cutoff frequency and attenuating those below. Band-pass filters allow frequencies around their cutoff frequency to pass through while blocking higher and lower ones. Band-stop or rejection filters block frequencies around their cutoff frequency and pass all others. Notch filters are a very aggressive form of band-stop filters.

Highlights

• Low-pass filters: pass frequencies below the cutoff, attenuate above. :filter::tophat:
• High-pass filters: pass frequencies above the cutoff, attenuate below. :filter::tophat:
• Band-pass filters: pass frequencies around the cutoff frequency. :filter::tophat:
• Band-stop or rejection filters: block frequencies around the cutoff frequency. :filter::tophat:
• Notch filters: very aggressive band-stop filters. :filter::tophat:

Key Takeaways

• Knowing the types of filters helps in controlling and manipulating sound frequencies.
• Filters are used in various applications like audio processing, signal processing, etc.