Re: K3 Noise Reduction..revisited
Posted by
Trevor Smithers on
Apr 30, 2009; 10:43am
URL: http://elecraft.85.s1.nabble.com/K3-Noise-Reduction-tp2742986p2746342.html
As far as I'm aware there are two companies that produce this technology for the amateur
market, BHI in the UK and Michels-Engineering in Germany. The german unit is designed
specifically for the extraction of the speech waveform when surrounded by noise. BHI is similar
but works with cw as well.
Here are a couple of links to audio samples of both units in operation
http://www.ing-michels.de/audio_demonstrations.htmlhttp://www.radio.bhinstrumentation.co.uk/html/demonstration.htmlThere is a downside to using these units in that they only work with a mono input so you loose the
binaural function. To get around this I purchased two of the internal modules (DX21) from
Michels-Engineering and wired them to each stereo channel. This allows independent control of
the noise reduction in each ear and retains the AFX/binaural function.
73
Trevor G0KTN
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