@techreport{MahnQuirtHoelleretal., author = {Mahn, Jeffrey and Quirt, David and H{\"o}ller, Christoph and M{\"u}ller-Trapet, Markus}, title = {Addendum to RR-335: sound transmission through Nail-Laminated Timber (NLT) assemblies}, publisher = {National Research Council of Canada. Construction}, doi = {10.4224/40000417}, abstract = {This report is published as an addendum to NRC Research Report RR-335 "Apparent Sound Insulation in Cross-Laminated Timber Buildings." It is intended that this addendum will be merged with RR-335 in the future as a report for predicting the sound insulation in buildings using mass-timber constructions including NLT assemblies. This report presents the results from experimental studies of airborne sound transmission through assemblies of nail-laminated timber (NLT) with various linings. To put the data presented in this report in the proper context, this report begins with a brief explanation of calculation procedures to predict the apparent sound transmission class (ASTC) between adjacent spaces in a building whose structure is a combination of mass-timber assemblies such as nail-laminated timber (NLT) or cross-laminated timber (CLT) panels.}, language = {en} } @techreport{HoellerMuellerTrapetKingetal., author = {H{\"o}ller, Christoph and M{\"u}ller-Trapet, Markus and King, Frances and Bradley, John}, title = {Evaluation of the communication performance of the C4 chemical, biological, radiological and nuclear mask}, doi = {10.4224/23003981}, abstract = {The Canadian Armed Forces (CAF) are using chemical, biological, radiological and nuclear (CBRN) general service respirators (GSRs) to defend against CBRN threats and hazards to protect personnel and ensure that they can safely and successfully carry out missions. The CBRN GSR currently in use by the CAF is the C4 respirator. The National Research Council of Canada assessed the communication performance of the C4 respirator. This report presents the results of the performance test. The method for assessing the communication performance used in this study was the NIOSH standard test procedure TEB-CBRN-APR-STP-0313 [1]. Other methods exist to evaluate the communication performance of respirators, but historically the NIOSH standard test procedure has been used. This report details the implementation and results of the tests conducted at the National Research Council of Canada, following the NIOSH standard test procedure.}, language = {en} } @inproceedings{HoellerMuellerTrapet, author = {H{\"o}ller, Christoph and M{\"u}ller-Trapet, Markus}, title = {Measured and predicted sound transmission through a laboratory concrete floor}, series = {53rd International Congress and Exposition on Noise Control Engineering (Inter-Noise 2024), 25.-29. August 2024, Nantes France}, booktitle = {53rd International Congress and Exposition on Noise Control Engineering (Inter-Noise 2024), 25.-29. August 2024, Nantes France}, language = {en} } @techreport{HoellerQuirtMahnetal., author = {H{\"o}ller, Christoph and Quirt, David and Mahn, Jeffrey and M{\"u}ller-Trapet, Markus}, title = {Guide to calculating airborne sound transmission in buildings}, edition = {5th edition}, publisher = {National Research Council of Canada. Construction}, doi = {10.4224/40001814}, abstract = {In recent years, the science and engineering for controlling sound transmission in buildings have shifted from a focus on individual assemblies such as walls or floors, to a focus on performance of the complete system. Standardized procedures for calculating the overall transmission, combined with standardized measurements to characterize sub-assemblies, provide much better prediction of sound transmission between adjacent indoor spaces. The International Standards Organization (ISO) has published a calculation method, ISO 15712-1 that uses laboratory test data for sub-assemblies such as walls and floors as inputs for a detailed procedure to calculate the expected sound transmission between adjacent rooms in a building. This standard works very well for some types of construction, but to use it in a North American context one must overcome two obstacles - incompatibility with the ASTM standards used by our construction industry, and low accuracy of its predictions for lightweight wood or steel frame construction. To bypass limitations of ISO 15712-1, this Guide explains how to merge ASTM and ISO test data in the ISO calculation procedure, and provides recommendations for applying extended measurement and calculation procedures for specific common types of construction. This Guide was developed in a project established by the National Research Council of Canada to support the transition of construction industry practice to using apparent sound transmission class (ASTC) for sound control objectives in the National Building Code of Canada (NBCC). However, the potential range of application goes beyond the minimum requirements of the NBCC - the Guide also facilitates design to provide enhanced sound insulation, and should be generally applicable to construction in both Canada and the USA. This publication contains a limited set of examples for several types of construction, to provide an introduction and overview of the ASTC calculation procedure. Additional examples and measurement data can be found in the companion documents to this Guide, namely NRC Research Reports RR-333 to RR-337. Furthermore, the calculation procedure outlined and illustrated in this Guide is also used by the software web application soundPATHS, which is available for free on the website of the National Research Council of Canada (see the references in Section 7 of this Guide for access details). Au cours des derni{\`e}res ann{\´e}es, les scientifiques et les ing{\´e}nieurs ont fait porter leurs efforts en mati{\`e}re d'att{\´e}nuation de la transmission du son dans les b{\^a}timents davantage sur le rendement du syst{\`e}me dans sa totalit{\´e} que sur les ensembles de construction individuels. Les m{\´e}thodes normalis{\´e}es de calcul de la transmission globale, combin{\´e}es {\`a} des mesures normalis{\´e}es de caract{\´e}risation des sous-ensembles, permettent de mieux pr{\´e}dire la transmission du son entre des espaces int{\´e}rieurs adjacents. L'Organisation internationale de normalisation (ISO) a publi{\´e} une m{\´e}thode de calcul, la norme ISO 15712-1, qui utilise des donn{\´e}es d'essai en laboratoire pour les sous-ensembles, comme les murs et les planchers, comme donn{\´e}es d'entr{\´e}e en vue d'une m{\´e}thode d{\´e}taill{\´e}e de calcul de la transmission du son pr{\´e}vue entre des pi{\`e}ces adjacentes dans un b{\^a}timent. Cette norme fonctionne tr{\`e}s bien pour certains types de construction, mais pour l'utiliser dans un contexte nord-am{\´e}ricain, il faut surmonter deux obstacles - l'incompatibilit{\´e} avec les normes ASTM utilis{\´e}es par notre industrie de la construction et la faible exactitude de ses pr{\´e}visions pour la construction {\`a} ossature de bois ou d'acier l{\´e}g{\`e}re. Pour contourner les limites de la norme ISO 15712-1, le pr{\´e}sent guide explique comment fusionner les donn{\´e}es d'essai de l'ISO et de l'ASTM dans la m{\´e}thode de calcul de l'ISO, et formule des recommandations relativement {\`a} l'application de m{\´e}thodes {\´e}largies de mesure et de calcul pour des types de construction courants. Le pr{\´e}sent guide a {\´e}t{\´e} {\´e}labor{\´e} dans le cadre d'un projet mis sur pied par le Conseil national de recherches du Canada afin d'appuyer la transition de la pratique de l'industrie de la construction vers l'utilisation d'un indice de transmission du son apparent (ITSA) satisfaisant aux objectifs de r{\´e}duction rigoureux du Code national du b{\^a}timent du Canada (CNBC). Toutefois, l'{\´e}ventail potentiel d'applications va au-del{\`a} des exigences minimales du CNBC - le Guide facilite aussi une conception visant {\`a} am{\´e}liorer l'insonorisation et devrait s'appliquer de fa{\c{c}}on g{\´e}n{\´e}rale {\`a} la construction tant au Canada qu'aux {\´E}tats-Unis. La pr{\´e}sente publication contient un ensemble limit{\´e} d'exemples pour plusieurs types de construction, afin de fournir une introduction et un aper{\c{c}}u de la m{\´e}thode de calcul de l'ITSA. On trouvera d'autres exemples et donn{\´e}es de mesure dans les documents d'accompagnement du pr{\´e}sent guide, {\`a} savoir, les rapports de recherche RR-333 {\`a} RR-337 du CNRC. De plus, la m{\´e}thode de calcul d{\´e}crite et illustr{\´e}e dans le pr{\´e}sent guide est {\´e}galement utilis{\´e}e par l'application Web soundPATHS, disponible gratuitement sur le site Web du Conseil national de recherches du Canada (voir les r{\´e}f{\´e}rences {\`a} la section 7 du pr{\´e}sent guide pour les d{\´e}tails d'acc{\`e}s).}, language = {en} }