Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

156
In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
156
Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

1.3K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.3K
Insulation Coordination01:23

Insulation Coordination

177
Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times...
177
Masonry Cavity Walls01:26

Masonry Cavity Walls

1.1K
Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
Maintaining a clean cavity during construction...
1.1K
Masonry Curtain Walls01:20

Masonry Curtain Walls

1.1K
Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer...
1.1K
Composite Masonry Walls01:18

Composite Masonry Walls

1.2K
Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
1.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Impact of Antarctic radar on Southern Hemisphere atmospheric river reanalysis and forecast.

Scientific reports·2026
Same authorSame journal

Numerical analysis on the improvement of sound insulation performance of plenum doors: effect of sound absorption and MPPs.

UCL open. Environment·2026
Same author

Application of transparent microperforated panels to acrylic partitions for desktop use: A case study by prototyping.

UCL open. Environment·2023
Same author

Some considerations on the use of space sound absorbers with next-generation materials reflecting COVID situations in Japan: additional sound absorption for post-pandemic challenges in indoor acoustic environments.

UCL open. Environment·2023
Same author

How did the 'state of emergency' declaration in Japan due to the COVID-19 pandemic affect the acoustic environment in a rather quiet residential area?

UCL open. Environment·2023

Related Experiment Video

Updated: Jul 29, 2025

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
05:26

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Published on: October 19, 2022

1.7K

Basic considerations on the practical method for predicting sound insulation performance of a single-leaf window.

Yohei Tsukamoto1,2, Kimihiro Sakagami2, Takeshi Okuzono2

  • 1YKK AP Inc., YKK AP R&D Centre, 1 Ogyu, Kurobe, Toyama 938-8612, Japan.

UCL Open. Environment
|May 25, 2023
PubMed
Summary

Predicting window sound insulation is complex. While fixed windows are predictable with existing theories, openable windows require accounting for frame gaps. The average frequency slope for window reduction index was found to be 3.0 dB per octave.

Keywords:
architectural acousticsmass lawmeasurementsingle glazingsound insulationwindow

More Related Videos

Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
08:25

Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow

Published on: April 30, 2018

7.2K
A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
08:41

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties

Published on: January 7, 2017

7.3K

Related Experiment Videos

Last Updated: Jul 29, 2025

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
05:26

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

Published on: October 19, 2022

1.7K
Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
08:25

Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow

Published on: April 30, 2018

7.2K
A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
08:41

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties

Published on: January 7, 2017

7.3K

Area of Science:

  • Acoustics
  • Building Physics
  • Materials Science

Background:

  • Accurate prediction of sound insulation performance in windows is crucial for building design.
  • Existing theories for sound reduction index (SRI) may not fully capture the complexities of real-world window structures.

Purpose of the Study:

  • To evaluate the applicability of existing theories for predicting the sound reduction index (SRI) of single-glazed windows.
  • To develop a more practical method for predicting window sound insulation performance, particularly for different window types.

Main Methods:

  • Comparison of calculated SRIs using Sewell's transmission theory with measured data from actual single-glazed windows.
  • Application of regression analysis to measured SRI data from a selection of actual windows.

Main Results:

  • Sewell's theory accurately predicts SRIs for fixed windows but is less effective for openable windows due to frame gaps.
  • The frequency slope of the window reduction index was found to be significantly lower than predicted by the mass law.
  • Regression analysis revealed an average frequency slope of 3.0 dB per octave for all examined windows.

Conclusions:

  • A single theoretical approach is insufficient for accurately predicting the sound insulation of all window types.
  • Further research and refined models are needed to account for factors like frame gaps in openable windows.
  • The established average frequency slope provides a valuable parameter for practical sound insulation prediction.