<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Usually acoustic measurements are done with impulses, AFAIK. An ideal impulse actually has all frequencies in it, so it's useful for that kind of thing. Plus it's easy to differentiate between the initial signal and the room effects just based on time.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>.hc</DIV><BR><DIV><DIV>On Feb 8, 2007, at 3:13 PM, Kevin McCoy wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><SPAN class="gmail_quote"></SPAN>Thank you all for your responses - each was very helpful! I am particularly interested (mostly out of curiosity) in how to "measure" the room with convolution - would I blast some pink noise and then re-record it with a good microphone, and then perform a frequency analysis on that? I am sure I can look this up somewhere. Would this then yield the resonant frequencies in the room? <DIV><SPAN class="e" id="q_110a2fcfbace6991_1"><BR><BR>Kevin<BR clear="all"><BR>-- <BR><BR><BR>++++<BR><A href="http://pocketkm.blogspot.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://pocketkm.blogspot.com </A> </SPAN></DIV><BR clear="all"><BR>-- <BR><BR><BR>++++<BR><A href="http://pocketkm.blogspot.com">http://pocketkm.blogspot.com</A><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="mailto:PD-list@iem.at">PD-list@iem.at</A> mailing list</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">UNSUBSCRIBE and account-management -> <A href="http://lists.puredata.info/listinfo/pd-list">http://lists.puredata.info/listinfo/pd-list</A></DIV> </BLOCKQUOTE></DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><P style="margin: 0.0px 0.0px 0.0px 0.0px; min-height: 14.0px"><BR></P><DIV>------------------------------------------------------------------------</DIV><P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Computer science is no more related to the computer than astronomy is related to the telescope. </FONT><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica"><SPAN class="Apple-converted-space"> <SPAN class="Apple-converted-space"> </SPAN></SPAN>-Edsger Dykstra</FONT></P><BR class="Apple-interchange-newline"></SPAN> </DIV><BR></BODY></HTML>