remove a specific frequency from emg signal
in [Matlab]
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From: Jan Simon on 9 Aug 2010 15:27 Dear Debora, > In fact, when I used a bortec electromyographer I did not have this low frequencies noise, but this new equipment saturates in really low frequencies. Ok, I assume, you are sure that this is noise. And I think, you've understood my question, because for the kind of investigations I perform, the 20 to 500Hz are just the modulation, while the signal I'm searching for is the on and off switching of the limb muscles, which have a frequency of 1 Hz (equivalent to 1 stride per second). So If I remove the 1 Hz part of the signal, the muscles seem to be active ever and with almost constant force. Anyhow, there can good reasons also to remove this part. Kind regards, Jan
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