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Fourrier Analysis of EMG

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  • Fourrier Analysis of EMG

    Hi Everybody,

    I have a question concerning my sampling frequency for EMG data collection
    and fast fourrier transformation. The current information that has been
    provided to me suggests that i need a sampling frequence of 5000Hz in order
    to perform an FFT analysis of the EMG signal.

    Unfortunately the equipment performing the data collection is not capable of
    handling the large influx of information (4 channels, 5sec of data - 100 000
    data points).

    The question therefore is how far can i reduce my sampling frequency before
    i begin corrupting the integrity of the FFT capabilities? I have played
    around with the sampling frequency and i believe i can get what i need at

    Any help or suggestions would be greatly appreciated.

    Nathan Deans (BHMS)(Ex. Sci.)(Hons)
    School of Exercise Science & Sport Management
    Southern Cross University
    P.O.Box 157
    Lismore, NSW, 2480, Australia
    +61 2 6620 3231 Office
    +61 2 6620 3880 Fax (updated)

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