# Audio Hum Removal

Remove electrical hum (50/60Hz and harmonics) from audio

> Canonical page: https://elysiatools.com/en/tools/audio-hum-removal

- **Category:** Media

- **Keywords:** audio, hum, electrical, 50hz, 60hz, power line, noise removal, notch filter

## Overview

Uses multiple notch filters to target electrical hum at 50Hz/60Hz and their harmonics. Useful for cleaning recordings with power line interference.

## Inputs

- **Audio File** (file): Select an audio file
- **Hum Type** (select)
- **Custom Frequency (Hz)** (number): e.g., 60
- **Include Harmonics** (checkbox): Remove harmonic frequencies (2x, 3x... up to 2kHz)
- **Filter Width (Hz)** (number): Width of frequency cut. Lower (1-5Hz) is better for preserving audio.
- **Reduction Depth (dB)** (number): How much to reduce the target frequencies. More negative = stronger reduction.
- **Output Format** (select)

## When to use

- When recording audio in environments with electrical noise, such as near power lines or faulty equipment.
- When post-processing interviews, podcasts, or voiceovers that have background hum from microphones or cables.
- When restoring old recordings or field audio that suffer from persistent 50Hz/60Hz interference.

## How it works

- Upload your audio file in a supported format like MP3, WAV, or AAC.
- Select the hum type preset (60Hz for Americas/Japan, 50Hz for Europe/Asia/Africa) or enter a custom frequency.
- Adjust settings including harmonics removal, filter width, and reduction depth to fine-tune the process.
- Download the cleaned audio in your chosen output format, such as MP3 or FLAC.

## Use cases

- Cleaning up podcast or interview recordings with microphone or interface hum.
- Enhancing field recordings by removing environmental electrical noise from equipment.
- Restoring vintage audio tapes, vinyl transfers, or old digital files with power line interference.

## Frequently asked questions

### What audio file formats can I upload?

The tool accepts common audio formats including MP3, WAV, AAC, M4A, OGG, Opus, and FLAC.

### How do I choose between 50Hz and 60Hz presets?

Select based on your region's power line frequency: 60Hz for the Americas and Japan, 50Hz for Europe, Asia, and Africa.

### What does the 'Include Harmonics' option do?

It removes higher frequency multiples of the base hum, such as 120Hz or 180Hz for 60Hz hum, for more thorough cleaning.

### Can I process multiple audio files at once?

No, the tool processes one file at a time to ensure precise control over hum removal settings.

### Will removing hum affect the original audio quality?

With careful settings like a narrow filter width (1-5Hz), it minimizes impact on desired audio while effectively reducing hum.

## Related tools

- [Audio Click Removal](https://elysiatools.com/en/tools/audio-click-removal): Remove clicks and pops from vinyl recordings
- [Audio DC Offset Fixer](https://elysiatools.com/en/tools/audio-dc-offset-fixer): Detect and remove DC offset from audio
- [Audio Declicker](https://elysiatools.com/en/tools/audio-declick): Remove clicks and pops from audio files caused by vinyl records, digital errors, or other impulsive noise sources
- [Audio Decrackler](https://elysiatools.com/en/tools/audio-decrackle): Remove crackles and subtle impulsive noise from audio files. Ideal for restoring old recordings, cassette tapes, and digitized vinyl with surface noise
- [Audio Filler Word Removal Map](https://elysiatools.com/en/tools/audio-filler-word-removal-map): Combine a timestamped transcript with the audio to mark filler words (um, uh, 嗯, 那个…) and optionally mute or remove them.
- [Audio Hum Harmonic Remover](https://elysiatools.com/en/tools/audio-hum-harmonic-remover): Remove 50/60Hz electrical hum and harmonic buzz from audio recordings.
- [Audio Noise Reducer](https://elysiatools.com/en/tools/audio-noise-reducer): Remove background noise from audio files using various noise reduction algorithms
- [Audio Breath Control Editor](https://elysiatools.com/en/tools/audio-breath-control-editor): Detect breaths in speech and naturally crossfade to reduce, remove, or keep them.

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows

## Related content

- [Audio Restoration, Noise Repair, and Cleanup Tools](https://elysiatools.com/en/hubs/audio-restoration-repair-workflows): Diagnose and repair clicks, hum, clipping, crackle, room sound, hiss, and harshness without promising lossless restoration.