Know which noise you have
| Noise | Sounds like | Usual cause |
|---|---|---|
| Hiss | A soft shhh under everything | Cheap microphone, gain set too high |
| Static and crackle | Irregular crackling | Bad cable, wireless interference |
| Hum | A low steady tone | Electrical ground loop, mains power |
| Buzz | A harsher tone with overtones | Lights, chargers, poor cables |
Remove it on iPhone
- Open the recording or video in Noise Reducer.
- Try Light first for hiss, Balanced for hum and buzz.
- Compare and save as M4A, WAV or video.
Stop it at the source
- Lower the input gain and get closer to the microphone instead.
- Unplug chargers and move away from lights and power adapters.
- Replace cables that crackle when moved.
Questions and answers
Can static be removed from a recording?
Steady static and hiss can be removed well. Loud crackles that cover the voice are harder.
How do I remove hum from a video?
Open the video in Noise Reducer and use Balanced. The picture stays untouched.