<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Makoto. For an introduction to the use of filters on EEG and especially ERP data, see chapter 5 in An Introduction to the Event-Related Potential Technique (MIT Press; available on <a href="http://amazon.com">amazon.com</a>). This is a fairly thorough discussion of filters, but intended for people with little or no math/engineering background.<div><br></div><div>Steve Luck</div><div><br></div><div><br><div><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>From: </b></span><span style="font-family:'Helvetica'; font-size:medium;">Makoto Miyakoshi <<a href="mailto:mmiyakoshi@ucsd.edu">mmiyakoshi@ucsd.edu</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Subject: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><b>Re: [Eeglablist] filters</b><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Date: </b></span><span style="font-family:'Helvetica'; font-size:medium;">June 6, 2012 11:28:15 AM PDT<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>To: </b></span><span style="font-family:'Helvetica'; font-size:medium;">Tim Schoof <<a href="mailto:t.schoof@ucl.ac.uk">t.schoof@ucl.ac.uk</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Cc: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>>, "Brunner, Clemens" <<a href="mailto:clbrunner@ucsd.edu">clbrunner@ucsd.edu</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Reply-To: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><<a href="mailto:mmiyakoshi@ucsd.edu">mmiyakoshi@ucsd.edu</a>><br></span></div><br><br>Dear Tim and Clemens,<br><br>Thanks for feedback.<br>Since I don't know much about signal processing, my understanding of<br>filter is the analog one used in an electric circuit with capacitors<br>and inductors (as used in speakers and amplifiers). Sor it is<br>intuitive for me, as Tim said, that slope and filter order are such<br>that 6dB for the first order (1 capacitor/inductor), 12dB for the<br>second order (capacitor + inductor), 18dB for the third order (3<br>elements), etc. But it seems filter can be 'designed' pretty freely in<br>signal processing.<br><br>Clemens, I would appreciate if you could show us an introductory<br>website or paper to learn what is digital filter.<br><br>Makoto<br></blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">--------------------------------------------------------------------<br>Steven J. Luck, Ph.D.<br>Director, Center for Mind & Brain<br>Professor, Department of Psychology<br>University of California, Davis<br>Room 109<br>267 Cousteau Place<br>Davis, CA 95618<br>(530) 297-4424<br>E-Mail: <a href="mailto:sjluck@ucdavis.edu">sjluck@ucdavis.edu</a><br>Web: <a href="http://mindbrain.ucdavis.edu/people/sjluck">http://mindbrain.ucdavis.edu/people/sjluck</a><br>Calendar: <a href="http://www.google.com/calendar/embed?src=stevenjluck%40gmail.com&ctz=America/Los_Angeles">http://www.google.com/calendar/embed?src=stevenjluck%40gmail.com&ctz=America/Los_Angeles</a><br>--------------------------------------------------------------------<br><br><br><br><br><br><br></span>
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