Love it! I'll try it.
Vicki
On 10/02/2011, at 10:35 AM, Avocet wrote:
> I may have cracked mic and system noise.
>
> First I did some measurements with a MKH416 deep under bedclothes. I
> filtered out the house noises with a steep HPF below 5kHz leaving a
> mic and mixer hiss which was 54dB below my "outdoors" speaking voice
> at 1 metre.
>
> I then sampled this hiss in Audacity 3.1 and used this as a noise
> sample using their noise subtraction command. With various recordings
> at the same level setting, Audacity took out the sample mic noise on
> all the recordings including a recording of hiss up to 20kHz.
>
> Comparing before and after in real time and also slowed down 10 times,
> I could hear no difference between the noise reduced version and the
> original except the absence of mic hiss. There were no audible
> artifacts or "gravel" effects.
>
> Next test will be with cheap =A39 mics to see if I could have saved two
> zeroes on mic costs. :-)
>
> David
>
> David Brinicombe
> North Devon, UK
> Cogito cogito ergo cogito sum - Ambrose Bierce
>
>
>
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