What is Background Noise / Noise Floor?

Background noise is any unwanted sound that gets captured along with your voice during recording. This includes everything from HVAC systems and computer fans to traffic outside, room echo, and electrical hum. The 'noise floor' refers to the baseline level of ambient noise in your recording environment—the quietest your recording can be even when you're not speaking. High background noise makes your podcast sound unprofessional and can cause listener fatigue, especially when people listen with headphones. Some background noise is inevitable, but the goal is to keep it low enough that it doesn't distract from your content. Professional podcasters typically aim for a noise floor below -60 dB, meaning the background noise is at least 60 decibels quieter than their speaking voice. You can reduce background noise through better recording environments (sound treatment, quieter rooms), better equipment (directional microphones that reject off-axis sound), and post-production tools (noise reduction plugins and software). However, aggressive noise reduction can introduce artifacts that sound robotic or unnatural. The best approach is to minimize noise at the source—record in a quiet, treated space—and use gentle noise reduction only for cleanup. Some background noise is actually acceptable and even adds character, but constant hum, hiss, or echo should be addressed.