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New Contributor
Posts: 3
Registered: ‎11-23-2016

How do you reduce audio noise?

I've tried several microphones I own of different types. but the audio noise floor on my C300 Mk II is higher than it ought to be. 

Are there audio settings I can use to reduce the noise floor? The noise floor is lower and sound cleaner on my Canon XC15.

Any suggestions?

Product Expert
Product Expert
Posts: 460
Registered: ‎10-17-2012

Re: How do you reduce audio noise?

Hello tomsemiterrific, 

When you mention the noise floor is higher I take this to mean the base level of the audio without any additional sound inducing equipment attached?  

Are you measuring this in any scientific or observable way or just from experience?  

What type and style microphones are you using?  

If none are connected, is the sound floor more or less completely quiet?  

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New Contributor
Posts: 3
Registered: ‎11-23-2016

Re: How do you reduce audio noise?

I've used a variety of microphones, a Naumann shot gun, an Audio Technica lavalier connected by XLR, and a Sennheiser Shotgun. 
Let me ask you about sound levels.

I have always set the sound levels so the spoken voice will peak out about -10 to -6DB.

Perhaps I'm putting my recording levels to high for the C300 Mk II. 

 

I do  not seem to get nearly as much noise on the XC15.

Product Expert
Product Expert
Posts: 460
Registered: ‎10-17-2012

Re: How do you reduce audio noise?

 Hello tomsemiterrific, 

 Thank you for the additional information.  It sounds like you have tried multiple different microphones and for that we thank you.  

The peaking levels sound about right, do they tend to keep in the red just a little?  Probably don't want them spiking too much but on this we trust your judgement that they're accurate.  

If you lower the levels does the sound quality issue subside, get worse or stay about the same? 

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Occasional Contributor
Posts: 7
Registered: ‎11-19-2016

Re: How do you reduce audio noise?

I haven't used the c300 but I am a sound guy (well, used to be). Without the microphone plugged in, do you hear a hissing noise in your headphones? And, does it change as you adjust the input level? It should be very, very quiet, even if turned almost all the way up, without anything attached. If you hear a strong hiss noise without a cable attached, there is something worong.

New Contributor
Posts: 3
Registered: ‎11-23-2016

Re: How do you reduce audio noise?

That sounds like...sound advice. thanks Larry. I'll check it out.

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Esteemed Contributor
Posts: 4,033
Registered: ‎08-13-2015

Re: How do you reduce audio noise?

[ Edited ]

tomsemiterrific wrote:

That sounds like...sound advice. thanks Larry. I'll check it out.


Understand this, most audio level controls do not control how much you can amplify a signal.  They attenuate the amplified signal.  In other words, a volume control adjusts how much you can turn it down, not how much you can turn it up.

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