Removing continuous hum from clip

S

sbryan

Well-known member
How would I do this in Adobe Audition if the unwanted noise is in the same frequency as the voices? When I use the noise reduction process, everything sounds tinny.

Thanks.
 
Usually the hum is at 60Hz, which is not the same freq as the voices. Here you can use a de-hummer or a notch filter at 60Hz.

If it's in the same freq, and you get a tinny sound from the noise reduction filter, then you can back off the filter to 50% or less. The voice will sound better, but a little bit of the noise will still be there. You have to choose what sounds better to you.

You can also try to hide the hum with background music.
 
Try switching to the spectral frequency view and see if you can isolate or at least understand the nature of the noise. If you see a narrow line across the display, try attacking it with a notch filter like Sumfun suggested. If it's broadband noise, then try the noise reduction effect. In the NR effect dialog, there's a reduction graph below the noise profile that allows you to control how much NR to apply across the freq. spectrum. I have found that adjusting this can help improve things while avoiding the tinniness. Click on the help button in the NR dialog for some useful info.
-Dan
 
If you have a section of the file that's JUST the hum, you can go to the noise reduction filters and use that section as the noise profile. I've done that with great success. This is another good reason to record room tone.
I don't have audition in front of me right now so I don't remember the exact names of the filters but you should be able to figure it out.. it's something like "restoration" ?
 
And make sure it's really hum. I had a director call me recently complaining that I recorded a hum and didn't tell him. I listened to the track he was complaining about, and it wasn't a hum, it was traffic noise, and I had specifically warned him about it on day one, noted it in all my sound logs. He just didn't want to believe - I isolated a bit of it, boosted it and he finally believed me.

Phil
 
Sorry, that clip is hopeless. Try again with better technique.

That isnt hum, that is noise from a computer or air conditioner, which you should have turned off before recording.
 
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