An Audio Noise Reducer can help clean up recordings by reducing unwanted background noise such as low-frequency rumble, light hiss, room noise, handling noise, and quiet sounds between spoken or sung phrases.

Upload an audio file and choose a noise-reduction preset or adjust the settings manually. The tool combines a noise gate, high-pass filter, and low-pass filter to clean different parts of the frequency spectrum.

The high-pass filter removes frequencies below the selected cutoff and can be useful for reducing microphone handling noise, HVAC vibration, traffic rumble, and other unnecessary low frequencies. The low-pass filter reduces very high frequencies and may help soften broadband hiss.

The noise gate threshold controls when quiet portions of the recording are reduced. Audio that falls below the selected level is turned down according to the reduction-strength setting. A lower threshold preserves more quiet material, while a higher threshold can provide stronger cleanup.

Noise reduction should generally be applied carefully. Excessive filtering can make vocals sound thin, remove instrument detail, cut off quiet words, or create unnatural changes in ambience. Complex noises that overlap the same frequencies as the wanted recording cannot always be removed cleanly with basic filtering.

For the best results, compare the processed audio with the original before downloading your cleaned file.

Tip: Start with the lightest noise reduction that solves the problem. If a vocal sounds unnatural or words begin disappearing, lower the noise-gate threshold or reduce the gate strength rather than increasing the processing.

Related Page:

Great Sound Absorbers - 8 Things That Will Help Your Studio Sound Quality