Forced Air Noise reduction

egproductions

egproductions

Veteran
Unfortunately I was forced to film in a location that had a really bad noise coming from their HVAC system. It sounded even worse when I reviewed the footage later. Does anyone have thoughts on the best way to go about making this sound better? I'm editing on the latest version of Premiere Pro CC, so if you have a specific filter and settings I could use, it woudl be very helpful.

Thank you! http://www.eliecreative.com/transfer/Forced%20Air%20Removal.wav
 
Fortunately, din type noise is the easiest to attenuate. Adobe Audition and the free Audacity DAW both have some kind of noise reduction. An accurate 'noise print' is usually the first step. (a few frames of room tone.. a pause in the dialog). It's often better to run NR a few times at lower settings to minimize artifacts. For instance, 4 times @ -5dB, instead of once -20dB; using a recaptured 'noise print' each time is best. Maybe someone here has the time to run your audio through iZotope's RX Advanced, one of the better restoration/NR utilities.
 
OSCURO said:
Couldn't download Bernie's attempt, but here's my take on it using RX.

https://instaud.io/1gyy

It sounds like artifacts towards the end, but those gusts sound more like bursts of air from the hvac or rustling from the speaker's clothing. Can't tell. Once you start removing layers of noise, other frequencies below that layer reveal themselves. Interesting stuff. You do lose a couple of DBs of gain with the reduction and some of the voice's lower frequencies. It's a bit flatter now and lacking body, but a little EQ can bring some of that back. Probably around 80-250hz. Better than listening to a **** storm of air conditioning.
Click to expand...
Nice job! My attempt has a little more noise left in but is a little brighter. As you say other noises become apparent as you peel back the noise. Did you use spectral denoise? I could probably do one more pass using dialogue isolate to get it closer to what you did.
 
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