Let’s take a few minutes to talk about the high-pass and low-pass filters in Audacity. High-pass and low-pass filters are an effective way to attenuate unwanted frequencies above or below a set point that you determine. It can be another way of eliminating or reducing unwanted noise in your podcast.
You can find my Audacity Bootcamp: Beginner to Advanced video teaching series is at https://www.udemy.com/course/audacity-bootcamp-beginner-to-advanced/.