<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_4871ea63-2d53-44fd-8203-3850ebb23205" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>S19C6</sptc><title id="_1d035508-0e85-41b2-81b8-41ddaf1bc1b4">Ambient sound level for a fire control centre</title><archive-num>2019: Spec E1.8: 5</archive-num><subclause id="_c29e1587-5dfe-48c8-8b2f-9035f717e0e5" outputclass="subclause"><title id="_ebe3ef9e-cf6e-4f32-8237-1d8ac78da894">SubClause</title><num>1</num><p>The ambient sound level within the fire control centre measured when all fire safety equipment is operating in the manner in which it operates in an emergency must not exceed 65 dB(A).</p></subclause><subclause id="_efd94a43-e029-42fb-8bbe-5e29c50739ca" outputclass="subclause"><title id="_06315947-600c-4e7b-a41e-56907508c331">SubClause</title><num>2</num><p>The measurement must be taken for a sufficient time to characterise the effects of all sound sources.</p></subclause><subclause id="_5f796f17-6131-438d-b8d0-32e508bcec08" outputclass="subclause"><title id="_d85d8b3d-f6b4-4002-89dd-c59dbc58b64c">SubClause</title><num>3</num><p>Where there is not a great variation in noise level, a measurement time of 60 seconds may be used.</p></subclause></clause>