Davidv Posted November 18, 2015 Report Share Posted November 18, 2015 Hey,So I'm using a Bosch donut type knock sensor. Which without filtering picks up everything (It's really interesting to listen to the regular engine noise, with headphones!)Howeverfor configuring a knock sensor in the Link, the options are:4-10khz wideband10-20khz widebandAnd then a list of narrowband options.I know that my engine knocks in the ~6khz range, however does this mean I need to use the 4-10khz wideband option, or do I select the 6khz narrowband? If I select the narrowband option, is it assuming that all knock that it "hears" is occuring at 6khz? Or does it mean that it picks out just the 6khz frequencies out of the rest.I've picked 6khz narrowband, and it seems like the signal to noise ratio is better than when I selected 4-10khz.However is this the right thing to be doing, or should I go back to 4-10khz since I'm using an unfiltered knock sensor. Quote Link to comment Share on other sites More sharing options...
Simon Posted November 18, 2015 Report Share Posted November 18, 2015 The narrow band setting will be the one to go for.This will give the clearest noise increase if knock should occur.Frequencies outside will be suppressed but if they were loud enough can still get through to some extent. Davidv 1 Quote Link to comment Share on other sites More sharing options...
Davidv Posted November 18, 2015 Author Report Share Posted November 18, 2015 Great, thanks! Quote Link to comment Share on other sites More sharing options...
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