Road Noise Inside A Car

Forum|Forum|6 years ago
October 19, 2019
2 replies
408 views

I had to interview somone inside a moving car on the freeway, thinking I would only need to transcribe for print later. But the audio turned out to be something I want to use. The road noise is unbearable as is; it hits -6 in some places, and the actual voice peaks are -1. Any De-Noise gurus out there that want to offer some advice for making this audio actually listenable. (file attached). It doesn't have to be perfect; I expect listeners will know it was captured in a moving vehicle, but I would just like to preserve as much of the nuance of the voice as possible. Any guidance you could give would be very much appreciated.

DY-sample.zip

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Mike Russell

Inspiring

Noise Reduction is the best bet. Follow Steve's advice and you should have something very usable. I tested DeNoise on this sample but it didn't work as well, in this case, as Noise Reduction.

SteveG_AudioMasters_

Community Expert

Fortunately, at least within the sample you gave, the noise is reasonably constant. This means that you stand a reasonable chance of reducing it quite a bit with NR. Set a high value of FFT size initially, take a noise print, and don't take too much noise off in a single pass (just a few dB). Now change the FFT size, resample the noise and have another shot at it, still taking off very little. And then do that again with a relatively low FFT value. Yes, you have to resample it each time and it's a pain - but this is definitely the best way to do it. It's never going to work out perfectly, but you can improve the legibility of it, definitely.

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