| Subject: | Re: What have I started? |
|---|---|
| From: | "Avocet" madl74 |
| Date: | Mon Oct 25, 2010 4:16 pm ((PDT)) |
> Has anyone had experiencies with filtering "hummm" noise with > programs > like spectrumlab, used by the VLF guys? Ricardo, Do you mean mains hum at 60 (or 50) cycles? This is often messy as it contains a string of harmonics. You can use a comb filter, which is a series of notch filters, or pick out the worst harmonics with a notch filter one at a time. David David Brinicombe North Devon, UK Cogito cogito ergo cogito sum - Ambrose Bierce |
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