How to remove background noise from an audio course

Listen for constant noise such as fans or hum, intermittent sounds such as clicks or traffic, and overlapping sounds that cannot be cleanly separated. For an audio course, noise that changes between lessons makes a course feel inconsistent.

Duplicate the untouched recording. Find a short section of room tone, note where the noise changes, and decide which distractions can be cut versus reduced.

Use the transcript to locate unwanted speech, repeated takes, and long interruptions. Make complete phrase-level edits and listen across every cut before applying broad processing.

Improve clarity in small steps and compare with the original. Stop when the voice begins to sound metallic, gated, or unnaturally dry; mild room tone is often preferable to artifacts.

Listen from beginning to end on headphones and speakers. Check pauses, transitions, and the quietest delivery, then export a clearly named master and delivery copy.