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Guide to Calculating Airborne Sound Transmission in Buildings: Fifth Edition, December 2019

https://research.thinkwood.com/en/permalink/catalogue2617
Year of Publication
2019
Topic
Acoustics and Vibration
Design and Systems
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Author
Hoeller, Christoph
Quirt, David
Mahn, Jeffrey
Müller-Trapet, Markus
Organization
National Research Council of Canada. Construction
Publisher
National Research Council of Canada. Construction
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Topic
Acoustics and Vibration
Design and Systems
Keywords
Apparent Sound Transmission Class
Sound Insulation
Sound Transmission
Concrete
Building Code
Impact Sound
Language
English
Research Status
Complete
Summary
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).
Online Access
Free
Resource Link
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Apparent Sound Insulation in Wood-Framed Buildings

https://research.thinkwood.com/en/permalink/catalogue1952
Year of Publication
2017
Topic
Acoustics and Vibration
Material
Light Frame (Lumber+Panels)
Application
Walls
Floors

Modelling Prerequisites – FEM/SEA Impact and Airborne Sound

https://research.thinkwood.com/en/permalink/catalogue840
Year of Publication
2017
Topic
Acoustics and Vibration
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Floors
Walls
Author
Bard, Delphine
Negreira, Juan
Guigou-Carter, Catherine
Borello, Gerard
Kouyoumji, Jean-Luc
Speranza, Alice
Coguenanff, Corentin
Hagberg, Klas
Organization
Silent Timber Build
Year of Publication
2017
Country of Publication
Sweden
Format
Report
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Floors
Walls
Topic
Acoustics and Vibration
Keywords
Europe
Finite Element Model
Frequencies
SEA Model
Prediction
Impact Sound Insulation
Airborne Sound Insulation
Language
English
Research Status
Complete
Summary
This report comprises reslts from the work done within work package 1 in the WWN+ project "Silent Timber Build", WP 1: Prediction tools, low and high frequencies. The aim from this WP was to develop prediction tools applied for wooden constructions. Included in this is also to create necessary basis for enough accuracy for any European wood construction. It implies development of new methods but also to understand how input forces primarily from the tapping machine affects the resuts of impact sound levels. The WP also describes how models are developed, in order to provide expected accuracy and then how to further improve the models in order to optimize floor and wall assemblies. The Work Package has been closely linked to WP 2 but also WP3. Using the reults from WP 2, the prediction model results can be compared to expected values for any European construction. From that optimization of floor assemblies and refining of the model is possible.
Online Access
Free
Resource Link
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Acoustics: Sound Insulation in Mid-Rise Wood Buildings

https://research.thinkwood.com/en/permalink/catalogue37
Year of Publication
2014
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Author
Schoenwald, Stefan
Zeitler, Berndt
King, Frances
Sabourin, Ivan
Organization
National Research Council of Canada
Year of Publication
2014
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Topic
Acoustics and Vibration
Keywords
Acoustics
Mid-Rise
Sound Insulation
Language
English
Research Status
Complete
Summary
This client report on the acoustics research component regarding sound insulation of elements and systems for mid-rise wood buildings is structured into a main part and four appendices. The main part outlines the background, main research considerations and summarizes conducted research and major outcomes briefly. It is structured like the Acoustics tasks in the Statement of Work of the Mid-rise Wood research project to identify accomplishments. For details on the research, testing and results, the main part references to four appendices that contain more details including test plans, test methods, specimen descriptions and all test data that is vetted so far.
Online Access
Free
Resource Link
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Serviceability of Next-Generation Wood Buildings: Sound Insulation Performance of Wood Buildings

https://research.thinkwood.com/en/permalink/catalogue402
Year of Publication
2014
Topic
Acoustics and Vibration
Serviceability
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Floors
Walls
Author
Hu, Lin
Organization
FPInnovations
Year of Publication
2014
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Floors
Walls
Topic
Acoustics and Vibration
Serviceability
Keywords
Apparent Sound Insulation Class
Field Sound Insulation Class
Apparently Sound Transmission Class
Field Sound Transmission Class
Language
English
Research Status
Complete
Summary
This report documents apparent/field impact insulation class (AIIC/FIIC) ratings and apparent/field sound transmission class (ASTC/FSTC) ratings for a large number of light-frame wood-joisted floors, cross-laminated timber floors (CLT), massive glulam floors, and a wood-concrete composite floor. The report includes various construction details involving finishings, membranes under finishings, toppings, underlayment materials for toppings, and drywall ceilings. This report also documents ASTC/FSTC ratings for some light-frame wood stud walls and CLT walls. The informal subjective evaluation of field floors and walls by FPInnovations staff, and by occupants, revealed that, if a FSTC or FIIC rating is below 45, occupants could clearly hear sound generated by their neighbor’s normal activities. If a FSTC or FIIC rating is above 50, occupants could still hear "muffled" sound generated by their neighbor’s normal activities, but do not hear it as clearly. If a FSTC or FIIC rating is above 60, occupants could not hear any sound generated by their neighbor’s activities, except when there is a lightweight floor with a carpet. In that case, low frequency footsteps could be heard even if the FIIC was above 60.
Online Access
Free
Resource Link
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Impact Sound Insulation in Wood Multi-Family Buildings

https://research.thinkwood.com/en/permalink/catalogue2623
Year of Publication
2012
Topic
Acoustics and Vibration
Design and Systems
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Author
Hu, Lin
Organization
FPInnovations
Year of Publication
2012
Format
Report
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Design and Systems
Keywords
Mid-Rise
High-Rise
Sound Transmission
Language
English
Research Status
Complete
Summary
The number of occupant complaints received about annoying low-frequency footstep impact sound transmission through wood floor-ceiling assemblies has been increasing in proportion with the increase in the number of multi-family wood buildings built. Little work has been conducted to develop solutions to control the low-frequency footstep impact sound transmission. There are no code provisions or sound solutions in the codes. Current construction practices are based on a trial and error approach. This two-years project was conducted to remove this barrier and to successfully expand the use of wood in the multi-family and mid- to high-rise building markets. The key objective was to build a framework for the development of thorough solutions to control low-frequency footstep sound transmission through wood floor-ceiling assemblies. Field acoustic tests and case studies were conducted in collaboration with acoustics researchers, builders, developers, architects, design engineers and producers of wood building components. The field study found that: 1. With proper design of the base wood-joisted floors and sound details of the ceiling: With no topping on the floor, the floor-ceiling assembly did not provide sufficient impact sound insulation for low- to high-frequency sound components ; Use of a 13-mm thick wood composite topping along with the ceiling did not ensure satisfactory impact sound insulation; Even if there was the ceiling, use of a 38-mm thick concrete topping without a proper insulation layer to float the topping did not ensure satisfactory impact sound insulation ; A topping system having a mass over 20 kg/m2 and composed of composite panels and an insulation layer with proper thickness achieved satisfactory impact sound insulation. 2. The proper design of the base wood-joisted floors was achieved by the correct combination of floor mass and stiffness. The heaviest wood-joisted floors did not necessarily ensure satisfactory impact insulation. 3. Proper sound ceiling details were found to be achieved through: Use of two layers of gypsum board; Use of sound absorption materials filling at least 50% of the cavity ; Installation of resilient channels to the bottom of the joists through anchoring acoustic system resulted in improved impact sound insulation than directly attaching the resilient channels to the bottom of the joists. A four-task research plan was developed to thoroughly address the issue of poor low-frequency footstep impact insulation of current lightweight wood floor-ceiling assemblies and to correct prejudice against wood. The tasks include: 1) fundamental work to develop code provisions; 2) expansion of FPInnovations’ material testing laboratory to include tests to characterize the acoustic properties of materials; 3) development of control strategies; and 4) implementation. The laboratory acoustic research facility built includes a mock-up field floor-ceiling assembly with adjustable span and room height, a testing system and a building acoustic simulation software. The preliminary study on the effects of flooring, topping and underlayment on FIIC of the mock-up of the filed floor-ceiling assembly in FPInnovations’ acoustic chamber confirmed some findings from the field study. The laboratory study found that: A topping was necessary to ensure the satisfactory impact sound insulation; The topping should be floated on proper underlayment; Topping mass affects impact sound insulation of wood framed floors; A floating flooring enhanced the impact sound insulation of wood framed floors along with the floating topping. It is concluded that: 1. even if the studies only touched the tip of the iceberg of the footstep impact sound insulation of lightweight wood-joisted floor systems, the proposed solutions are promising but still need verification ; 2. with proper design of the base wood floor structure, the proper combination of flooring, and sound ceiling details along with proper installation, the lightweight wood floor-ceiling assembly can achieve satisfactory impact sound insulation ; 3. this study establishes a framework for thoroughly solving low-frequency footstep impact sound insulation problem in lightweight wood-joisted floor systems. Solutions will be developed in the next phase of this study as planned and the study will be conducted under NRCan Transformative Technology program with a project dedicated to “Serviceability of next generation wood building systems”.
Online Access
Free
Resource Link
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Acoustics Summary: Sound Insulation in Mid-Rise Wood Building

https://research.thinkwood.com/en/permalink/catalogue750
Year of Publication
2014
Topic
Acoustics and Vibration
Design and Systems
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Author
Schoenwald, Stefan
Zeitler, Berndt
King, Frances
Sabourin, Ivan
Organization
National Research Council of Canada
Year of Publication
2014
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Design and Systems
Keywords
Mid-Rise
Sound Insulation
Impact Sound Transmission
Airborne Sound Transmission
Language
English
Research Status
Complete
Summary
This report summarizes the acoustics research component regarding sound insulation of elements and systems for the research project on mid-rise and larger wood buildings. The summary outlines the background, main research considerations, research conducted and major outcomes. Further details of the design and the results can found in the appendix of Client Report A1-100035-02.1 [1]. The goal of the acoustics research components was to develop design solutions for mid-rise wood and wood-hybrid buildings that comply both with the current National Building Code of Canada (NBCC) 2010 [2] requirements for direct sound insulation and with the anticipated requirements for flanking sound transmission in the proposed, 2015 version of the NBCC. In addition, the design solutions were to provide better impact sound insulation while still achieving code compliance for all other disciplines (interdependencies) as identified in the final report of the scoping study conducted in FY 2010/2011 [3]
Online Access
Free
Resource Link
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From Canada to the World: FPInnovations' Three-Generation Floor Vibration Research and Code Implementation

https://research.thinkwood.com/en/permalink/catalogue2826
Year of Publication
2021
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Author
Hu, Lin
Cuerrier-Auclair, Samuel
Qian, Cheng
Dale, Angela
Organization
FPInnovations
Year of Publication
2021
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Lumber Joists
Engineered Wood Joists
Mass Timber
Floor Vibration-controlled Design Method
CSA 086
National Building Code of Canada
Language
English
Research Status
Complete
Series
InfoNote
Summary
FPInnovations’involvementinvarious codes and standards technical committeesaimsto monitor, contributeor propose changes for improvement as well as to create new standards to include new wood products and systems based on knowledge developed from FPInnovations’ research activities. Involvement also allows FPInnovations to be aware of any potential changes to codes and standards and to recognize and address threats and opportunities for wood use. Codes and standards exist to protect consumers but are written to reflect the current practices and knowledge based on a consensus agreement by committee members. FPInnovations’ involvement in codes and standards committees helps to align the coming changes with new wood products. This InfoNote reports on FPInnovations’ contribution to the floor vibration-control design methods on codes and standards implementation and research.
Online Access
Free
Resource Link
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Acoustic Performance of All-Wood Floor Systems

https://research.thinkwood.com/en/permalink/catalogue1931
Year of Publication
2017
Topic
Acoustics and Vibration
Material
Light Frame (Lumber+Panels)
Application
Floors
Organization
APA
Year of Publication
2017
Country of Publication
United States
Format
Report
Material
Light Frame (Lumber+Panels)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Sound Transmission Class
Impact Isolation Class
Code
Language
English
Research Status
Complete
Online Access
Free
Resource Link
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Solutions for Mid-Rise Wood Construction: Cone Calorimeter Results for Acoustic Membrane Materials Used in Floor Assemblies (Report to Research Consortium for Wood and Wood-Hybrid Mid-Rise Buildings)

https://research.thinkwood.com/en/permalink/catalogue1951
Year of Publication
2014
Topic
Acoustics and Vibration
Material
Light Frame (Lumber+Panels)
Application
Floors

10 records – page 1 of 1.