hey everyone today we're going to show you how to easily reduce the background
noise in audacity using the noise reduction effect so check it out hey
everyone welcome to Northern Viking everyday if you are new to this channel
my name is Ken and we bring you videos on reviews and how to's so make sure you
click that subscribe button so you don't miss out on upcoming videos today we're
gonna show you how to use the noise reduction effect in audacity it's super
simple to do and it'll help reduce that background noise in all of your audio
clips so let's head on over to my desktop and show you exactly how to do
this so all the audio in this video is being recorded on a blue snowball USB
microphone I've got it right here and a lot of people have been asking me lately
what microphone I use so it's the blue snowball USB I put a link below to
Amazon if you do want to pick one up yourself if you like how this video
sounds and they're available in a few different colors silver black green and
white use one start at around $40 and new ones at about 55 so go check those
out if you are interested let's hop on over to audacity and get right into the
noise reduction so we've got an audacity loaded up here and we'll start recording
my voice in just a moment so we can reduce the background noise but one
thing I do want to mention is that we're gonna need something called a noise
profile in a couple steps down the road so what that is we want to start
recording and not talk for a couple seconds so we can grab a noise profile
where there's no talking and then we can start recording our voice after that so
that's what we're gonna do the other thing we need is some background noise
so I've got my trusty fan here and I'm gonna turn that on so we get some
background noise and then I'm gonna start recording so I'm gonna do the
noise profile area first and then some audio of me talking
testing 1 2 3 4 5 we are testing the noise reduction effect in audacity
alright so we've got our audio recording here and we are gonna start working on
that noise reduction effect so first off you can see there are waveforms here
from the fan and then our are talking so I'm just gonna hit play here you can
hear hear what that sounds like there's lots of background noise alright so
that's what it we've got so now we need to grab a noise profile so we're gonna
want to grab a noise profile from this area here at the beginning where there
is no talking so we don't want to be up here in the white where there's the
green bar we want to be down here in the gray and we're just gonna select a
selection here where there's no talking so I just left-click and drag in the
gray bars there and then we want to go up to the effects tab up here at the top
and click effects and you're gonna see an option here in the middle that says
noise reduction so we're gonna go ahead and select noise reduction and this is
where we're gonna get into the noise profile we're gonna do that in a moment
there are some settings down here at the bottom so I'm gonna just leave these on
the default settings but if you want to pull out more decibels if you pull out
too many it's gonna start to reduce and play with your you're talking so we're
gonna leave it on the defaults today so that's the noise reduction in decibels
you can play with the sensitivity as well you can play with the frequency
smoothing now you might be asking me what in the world is frequency smoothing
well audacity says that values of 1 or higher this control spreads the noise
reduction into the specified number of neighboring bands that's starting to get
pretty technical so I'll leave it up to you to play with these settings to find
the perfect sound that you like next up we need to go ahead and get that noise
profile so we're gonna push that get noise profile button and that's gonna
pull the noise profile from this section that we have selected here so go ahead
and push that button and now we need to apply that noise profile to the entire
audio clip so if you go to the darker section of grey here and double-click so
you select the entire clip we are going to go up to the top tab here under the
effects tab and we're looking for the option here it's the second one down it
says repeat noise reduction or ctrl R on a Windows computer so we're gonna go
ahead and push that button but watch what happens to the waveforms in the
audio clip the the short ones we're just gonna disappear let's go ahead and push
this button and watch closely and you can see they disappeared so it took out
all that background noise so let's go ahead and play this clip so you can hear
what it sounds like testing 1 2 3 4 5 we are testing the noise reduction effect
in audacity so I'd say that sounds really good let's go ahead and undo the
noise reduction effect to compare it to before
testing 1 2 3 4 5 we are testing the noise reduction effect in audacity and
I'd say that's a pretty huge difference between the two files so I'll just redo
that noise reduction there and then from there you can just go ahead and save
that file and export it to mp3 or whatever format you are using so I hope
this tutorial of the noise reduction effect in audacity did help you if it
did make sure to give it a thumbs up also remember to subscribe to northern
Viking everyday because I've got tons of videos coming up that I'd love to
share with you thanks so much for watching and take care