SIST-TP CEN/TR 16961:2018

Declaration of uncertainties in test reports

The purpose of this document is to indicate how to present the uncertainty data determined by EN ISO 12999-1 in a laboratory test report of the Sound reduction index R of a building product or a building system, determined in accordance with EN ISO 717-1 and EN ISO 10140-2:2010, Figure B.1. It is planned to include this information in EN ISO 10140-2.

Déclaration des incertitudes dans les rapports d’essai

Le présent document a pour objectif d'indiquer comment présenter les données d'incertitude déterminées par l'EN ISO 12999-1 dans un rapport d'essai en laboratoire de l'indice d’affaiblissement acoustique R d'un produit ou d'un système de construction déterminé conformément à l'EN ISO 717-1 et à l'EN ISO 10140-2:2010, Figure B.1. Il est prévu d’intégrer ces informations dans l’EN ISO 10140-2.

Izjava o negotovosti v poročilih o preskušanju

Namen tega dokumenta je določiti način predstavitve podatkov o negotovosti v poročilu o preskušanju zvočne izolirnosti R gradbenih proizvodov in sistemov, skladnih s standardoma EN ISO 717-1 in EN ISO 10140-2:2010 (slika B1), kot je določeno v standardu EN ISO 12999-1.

General Information

• Status: Published
• Public Enquiry End Date: 28-Feb-2016
• Publication Date: 18-Sep-2018
• ICS: 91.120.20 - Acoustics in building. Sound insulation
• Technical Committee: AKU - Acoustics
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 31-May-2018
• Due Date: 05-Aug-2018
• Completion Date: 19-Sep-2018
• Ref Project: CEN/TR 16961:2018 - Declaration of uncertainties in test reports

Overview

CEN/TR 16961:2018 - "Declaration of uncertainties in test reports" provides practical guidance on how to present measurement uncertainty for airborne sound insulation results in laboratory test reports. It specifically covers the declaration of uncertainty for the sound reduction index R and derived single-number quantities (e.g. Rw, R + C, R + Ctr) measured in accordance with EN ISO 10140-2 and rated per EN ISO 717-1. The Technical Report explains how to apply uncertainty data determined by EN ISO 12999-1 and notes that this guidance is planned to be incorporated into EN ISO 10140-2.

Key topics and requirements

• Purpose: show how to present uncertainty data for laboratory measurements of airborne sound insulation.
• Source of uncertainties: apply uncertainty estimates determined following EN ISO 12999-1; use specimen- or class-specific data where available.
• Fallback values: when no specimen-specific data exist, use the standard uncertainty values listed in Table 1 of the report (derived from inter-laboratory results).
• Confidence intervals: declare uncertainty as two-sided intervals; recommended coverage factor k = 2 (approx. 95% confidence).
• Reporting format: example report formats are provided (e.g. Rw(C;Ctr) = 33(-2; -5) dB and expanded uncertainties such as Rw = (33.2 ± 2.4) dB, k = 2).
• Warnings: if uncertainty for the tested specimen/class is unknown, include a clear warning that confidence may be lower.

Practical applications

• Test laboratories: to standardize how uncertainty is documented in acoustic test reports and certificates.
• Manufacturers and product developers: to present product airborne sound insulation with consistent uncertainty statements for marketing and compliance.
• Certification bodies and specifiers: to interpret test reports and compare products while accounting for measurement uncertainty.
• Acoustic consultants and building designers: to assess risk and performance margins when selecting partitioning, glazing or façade elements for projects.
• Procurement and regulatory compliance: to ensure declared acoustic performance includes appropriate confidence intervals for contractual and regulatory decisions.

Related standards

• EN ISO 12999-1 - Determination and application of measurement uncertainties in building acoustics (sound insulation)
• EN ISO 717-1 - Rating of sound insulation in buildings and of building elements (airborne)
• EN ISO 10140-2:2010 - Laboratory measurement of airborne sound insulation (measurement methodology)
• Product/test codes referenced: EN 16703 (drywall systems), EN 12758 (glazing)

By following CEN/TR 16961:2018, stakeholders can produce clearer, comparable acoustic test reports that correctly communicate the measurement uncertainty associated with airborne sound insulation results.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2018
,]MDYDRQHJRWRYRVWLYSRURþLOLKRSUHVNXãDQMX
Declaration of uncertainties in test reports
Déclaration des incertitudes dans les rapports d’essai
Ta slovenski standard je istoveten z: CEN/TR 16961:2018
ICS:
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 16961
TECHNICAL REPORT
RAPPORT TECHNIQUE
May 2018
TECHNISCHER BERICHT
ICS 91.120.20
English Version
Declaration of uncertainties in test reports
Déclaration des incertitudes dans les rapports d'essai

This Technical Report was approved by CEN on 20 February 2018. It has been drawn up by the Technical Committee CEN/TC
126.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16961:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Airborne sound insulation . 4
Bibliography . 6

European foreword
This document (CEN/TR 16961:2018) has been prepared by Technical Committee CEN/TC 126
“Acoustic properties of building elements and of buildings”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
1 Scope
The purpose of this document is to indicate how to present the uncertainty data determined by
EN ISO 12999-1 in a laboratory test report of the Sound reduction index R of a building product or a
building system, determined in accordance with EN ISO 717-1 and EN ISO 10140-2:2010, Figure B.1. It
is planned to include this infor
...