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Saxophones: gear, playing, repair, impro
Saxophone Pad Acoustics Study
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<blockquote data-quote="jbtsax" data-source="post: 226472" data-attributes="member: 1801"><p>I have found nothing in acoustics literature to suggest that the pressure inside a sounding instrument drops to below atmospheric pressure. </p><p></p><p>"Node" means none or nothing, therefore at a <em>pressure node</em> there is zero pressure. At a <em>velocity (or displacement) node</em> there is no air flow. Conversely at a <em>pressure antinode</em> there is the maximum pressure, and at a <em>velocity antinode</em> there is the maximum air flow. This simulation should help to clarify these terms: <a href="http://cnx.org/resources/3a545658a3748a699d21b4c7152c0c1332fa9198/PressureWaveNew.swf" target="_blank"><strong>Nodes and Antinodes</strong></a></p></blockquote><p></p>
[QUOTE="jbtsax, post: 226472, member: 1801"] I have found nothing in acoustics literature to suggest that the pressure inside a sounding instrument drops to below atmospheric pressure. "Node" means none or nothing, therefore at a [I]pressure node[/I] there is zero pressure. At a [I]velocity (or displacement) node[/I] there is no air flow. Conversely at a [I]pressure antinode[/I] there is the maximum pressure, and at a [I]velocity antinode[/I] there is the maximum air flow. This simulation should help to clarify these terms: [URL='http://cnx.org/resources/3a545658a3748a699d21b4c7152c0c1332fa9198/PressureWaveNew.swf'][B]Nodes and Antinodes[/B][/URL] [/QUOTE]
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