Hi Benjamin, I actually have noticed quite strong motion artifacts (especially while running) even with the standard short wires. Would securing the wires with tape to the subject chest/skin resolve this issue?
thanks, raffaele 2012/4/4 Benjamin Kuris <[email protected]> > Jonas, longer leads will introduce two problems: > 1) Motion artifacts > 2) Mains interference. > > The 1st can be mitigated by securing lead wires to the subject so that > movement and additional wire weight doesn't change the skin-electrode > interface. > > The 2nd can be addressed with notch filtering of mains frequency and > associated harmonics (FFT signal and see what harmonics are causing > issues). Worst case, or if you want to avoid filtering, use shielded > wire for the leads and connect the shield to the RL drive terminal on > the Shimmer ECG. > > -Ben > > > > > On Wed, Apr 4, 2012 at 7:44 AM, Jonas Lucchesi <[email protected]> > wrote: > > > > Hello, > > > > I'm developing an application using ECG sensor and it woud be > interesting > > if I could use longer leads (about 1 ~ 2 meters). Do someone know if > using > > leads in that size will bring me problems in signal acqusition (like much > > more noise, or anything else that couldn't be handled) ? > > > > Thanks, > > > > Jonas > > > > _______________________________________________ > > Shimmer-users mailing list > > [email protected] > > https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users > > > _______________________________________________ > Shimmer-users mailing list > [email protected] > https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users >
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