<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_24f49632-8dc8-4d0b-8508-b51e391bcfcb" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 4"/><facet building="Class 5"/><facet building="Class 6"/><facet building="Class 7a"/><facet building="Class 7b"/><facet building="Class 8"/><facet building="Class 9a"/><facet building="Class 9b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>S29C3</sptc><title id="_0ce6fda9-0c93-4999-aadd-95910d9f671c">Method</title><archive-num>2019: Spec F5.5: 3</archive-num><clause-variation href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/7023_0.4.0.xml" variation="NT" variation-type="REPLACE">NT REPLACE Clause</clause-variation><subclause id="_18edd708-f524-4a13-89a8-b43161216ddd" outputclass="subclause"><title id="_1e8f94f9-7a34-49da-bfa5-d3097195c578">SubClause</title><num>1</num><p>The wall constructions to be compared must be tested in accordance with AS 1191.</p></subclause><subclause id="_089ad0d7-ff73-480b-9183-81cbaf457439" outputclass="subclause"><title id="_181aea8b-fb0c-414c-9149-6baf6bc60c7f">SubClause</title><num>2</num><p>A horizontal steel platform 510 mm x 460 mm x 10 mm thick must be placed with one long edge in continuous and direct contact with the wall to be tested on the side of the wall on which the impact sound is to be generated.</p></subclause><subclause id="_62dc3336-ec23-4de3-907f-9fd77b49cb9b" outputclass="subclause"><title id="_7a57bdba-00d3-492d-90ee-4b1adf3e51c9">SubClause</title><num>3</num><p>A tapping machine complying with ISO 140/6 — 1998 (E) must be mounted centrally on the steel platform.</p></subclause><subclause id="_c1e2d88b-6fe3-40c2-a9cc-9a994aa632c1" outputclass="subclause"><title id="_43192661-a9a6-481a-9a2a-df05806607d9">SubClause</title><num>4</num><p>The sound transmission through the wall must be determined in accordance with AS 1191 except that the tapping machine as mounted on the steel platform must be used as the source of sound.</p></subclause><subclause id="_30047e75-f180-4bfd-b890-2647a5e0adbd" outputclass="subclause"><title id="_a12d0423-e64f-485f-b7ab-e56691fc1e7c">SubClause</title><num>5</num><p>The impact sound pressure levels measured in the receiving room must be converted into normalised levels using a reference equivalent absorption area of 10 m<sup id="_2e3e472e-e49e-471c-9ff8-46e318e34da5">2</sup>.</p></subclause></clause>