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| Subject: | Re: LF: Re: VLF 29501, signal? |
| From: | Paul Nicholson <[email protected]> |
| Date: | Wed, 05 Mar 2014 23:55:57 +0000 |
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Johan wrote: > 24 dB S/N is "armchair copy". Well that 24dB is a 5 hour integration in 55uHz. It makes a big sharp line on the spectrum though. At VLF that counts as 'armchair'. > It would be interesting to actually listen to a > spectrally shifted and time compressed version of > the signal. > Can you do that on your Linux box Paul? No problem. 5 hours compressed into 22.5 seconds and frequency shifted so that 29499 Hz is moved to 400 Hz. wav format 32k samples/sec mono 1.4 Mbyte http://67.207.143.181/wh2xba1_140303a.wav How good is your 'CW ear' I wonder? Purposely I haven't filtered it too aggressively so you can apply your own filter to suit your ear. -- Paul Nicholson -- |
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