<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">hello all,<div><br></div><div>the transducer you're describing is the venerable rolen-star transducer. you can sometimes find old stock around, but they've been replaced for the most part by similar but more powerful transducer from maurice (can't seems to find his last name at the moment) at <a href="mailto:sales@invisiblestereo.com">sales@invisiblestereo.com</a></div><div><br></div><div>i'm not sure of the low frequency range of these things, but i suspect the for real low end (and infra-sound), it might be worth looking into those obnoxious car stereo kickers. you'll need to account the the resonant frequency of the object you are transducing (and wavelengths in the room etc).</div><div><br></div><div>i did a version of rainforest at the guelph jazz festival last year and i can't recommend maurice highly enough! he was extremely helpful and has worked with various sound artists (including, I think david tudor!) doing stuff so he 'gets' what we do. which cuts down some of the explaining.</div><div><br></div><div>because of my limited budget, i used a mix of these transducers and transformer-driven piezo elements. you can get a little taste here:</div><div><br></div><div><a href="http://vimeo.com/30872968">http://vimeo.com/30872968</a></div><div><br></div><div>happy new year to all,</div><div><br></div><div>ben</div><div><br><div><div>On 1 Jan, 2012, at 5:22 pm, Manannan Mac Lir wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span style="font-family:Verdana"><span style="font-size:12px">Hi,<br>
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I took part in a part in an installation based on David Tudor's rainforest which used transducers attached to various objects. In this case there were 8 objects all metal. We went to a scrap and picked out various pieces, all were hung from the ceiling with cables to let them ring freely. The loudest was an 8 footx3 foot steel kitchen counter top which responded the most musically without much encouragement and sounded like a big reverb. I did some trials with applying a transducer with a fixed pitch signal to various materials. I found most of them harsh. It gave me a nice sense of how different materials filter and disperse the sound in different ways. I like the work Mark Bain has done with doing things to buildings that he probably shouldn't. I cant remember the type of transducer but it was kinda creamy coloured smoke alarm lookin thing.<br>
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Macdara <br>
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<blockquote style="border-left: #ccc 1px solid; margin: 0px 0px 0px 5px; padding-left: 5px" type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">
<span style="font-family: Verdana"><span style="font-size: 12px">----- Original Message -----</span></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">
<span style="font-family: Verdana"><span style="font-size: 12px">From: michael trommer</span></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">
<span style="font-family: Verdana"><span style="font-size: 12px">Sent: 12/29/11 05:55 PM</span></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">
<span style="font-family: Verdana"><span style="font-size: 12px">To: <a href="mailto:microsound@microsound.org">microsound@microsound.org</a></span></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">
<span style="font-family: Verdana"><span style="font-size: 12px">Subject: [microsound] Transducers as speakers</span></span></div>
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<font size="4"><font face="Calibri, Verdana, Helvetica, Arial"><span style="font-size: 11pt">Hi all...<br>
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I was wondering if anyone has had any experience using transducer-type speakers.<br>
I’m planning on using them to generate low frequencies, including infrasound, for a gallery-based installation.<br>
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Any info regarding how different materials (e.g. drywall, wood/cement floors, etc.) respond with respect to loudness and eq, power requirements etc. would be useful.<br>
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Fwiw, here are some of the speakers I’ve been looking at:<br>
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<a href="http://www.soliddrive.com/solid-drive.html">http://www.soliddrive.com/solid-drive.html</a><br>
<a href="http://www.woweeone.com/index.php">http://www.woweeone.com/index.php</a><br>
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Cheers (and happy new year)...<br>
<br>
michael<br>
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....................................<br>
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<a href="http://michaeltrommer.blogspot.com/">http://michaeltrommer.blogspot.com/</a><br>
<a href="http://soundcloud.com/sans-soleil/">http://soundcloud.com/sans-soleil/</a><br>
<a href="http://michaeltrommer.bandcamp.com/">http://michaeltrommer.bandcamp.com/</a><br>
<a href="http://www.myspace.com/mtrommer">http://www.myspace.com/mtrommer</a></span></font></font><br>
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<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><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-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; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div><span class="Apple-tab-span" style="white-space: pre; "><br class="Apple-interchange-newline"><br></span></div><div><span class="Apple-tab-span" style="white-space: pre; "><br></span></div><div><span class="Apple-tab-span" style="white-space: pre; "><br></span></div><div><span class="Apple-tab-span" style="white-space: pre; "><br></span></div><div><span class="Apple-tab-span" style="white-space: pre; "><br></span></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>_________________________</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span> <span class="Apple-tab-span" style="white-space: pre; "> </span> <a href="http://www.macrophone.org">www.macrophone.org</a></div><div><span class="Apple-tab-span" style="white-space: pre; "> </span><a href="http://soundcloud.com/ben_grossman">soundcloud.com/ben_grossman</a></div></div></div><div><br></div></div></span></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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