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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=D_nT%2Cw_%2B_C_tr</id>
		<title>D nT,w + C tr - Revision history</title>
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		<updated>2026-04-06T13:27:18Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://www.designingbuildings.co.uk/w/index.php?title=D_nT,w_%2B_C_tr&amp;diff=295335&amp;oldid=prev</id>
		<title>Designing Buildings: Created page with &quot;Approved document E: Resistance to the passage of sound, 2003 edition incorporating 2004, 2010, 2013 and 2015 amendments, defines D_nT,w + C_tr as: ‘A single-number quantity wh...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=D_nT,w_%2B_C_tr&amp;diff=295335&amp;oldid=prev"/>
				<updated>2025-02-06T07:09:29Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;Approved document E: Resistance to the passage of sound, 2003 edition incorporating 2004, 2010, 2013 and 2015 amendments, defines D_nT,w + C_tr as: ‘A single-number quantity wh...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Approved document E: Resistance to the passage of sound, 2003 edition incorporating 2004, 2010, 2013 and 2015 amendments, defines D_nT,w + C_tr as: ‘A single-number quantity which characterises the airborne sound insulation between rooms using noise spectrum no. 2 as defined in BS EN ISO 717-1:1997. See BS EN ISO 717-1:1997.’&lt;br /&gt;
&lt;br /&gt;
See also: [[D_nT,w|D_nT,w]] and [[C_tr|C_tr]]&lt;br /&gt;
&lt;br /&gt;
= Related articles on Designing Buildings =&lt;br /&gt;
&lt;br /&gt;
* Airborne sound.&lt;br /&gt;
* Approved document E.&lt;br /&gt;
* Approved documents.&lt;br /&gt;
* Building acoustics.&lt;br /&gt;
* Building regulations.&lt;br /&gt;
* Noise nuisance.&lt;br /&gt;
* Reverberation.&lt;br /&gt;
* Room acoustics.&lt;br /&gt;
* Sound absorption.&lt;br /&gt;
* Sound insulation.&lt;br /&gt;
* Sound.&lt;br /&gt;
* Structure-borne sound.&lt;br /&gt;
&lt;br /&gt;
[[Category:DCN_Definition]] [[Category:Definitions]]&lt;/div&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

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