Towards Acoustic Comfort in Buildings

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Energy, Physics, Environment, and Systems".

Deadline for manuscript submissions: closed (15 September 2023) | Viewed by 2702

Special Issue Editors

Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Malacca, Malaysia
Interests: engineering acoustics; acoustic materials; vibro-acoustics; building acoustics; structural dynamics

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Guest Editor
Department of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesa 10, Bandung 40132, Indonesia
Interests: engineering acoustics; acoustic materials; vibro-acoustics; building acoustics

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Guest Editor
Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
Interests: sustainable materials; structural engineering

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Guest Editor
Department of Architecture, Faculty of Built Environment, Universiti Malaya, Kuala Lumpur 50603, Malaysia
Interests: architectural acoustics; environmental acoustics; building acoustics

Special Issue Information

Dear Colleagues,

Building acoustics has been an interesting research topic for decades. As we spend most of our time in buildings, acoustic comfort inside a building is therefore of the utmost importance. This includes designing buildings to be quiet and free from unwanted noise, as well as designing spaces with good sound quality for specific purposes, such as concert halls or classrooms.

The role of acoustic materials are crucial. Although synthetic materials such as glass wools and rock wools are still widely employed, more environmentally friendly materials, such as natural fibers from plants, have been found to have comparable sound absorption performance. Studies on non-fibrous acoustics absorbers, such as micro-perforated panels (MPPs) are also progressing in terms of their configurations to broaden the frequency of absorption. The use of 3D-printing technology enhances the flexibility of various configurations of MPPs. This includes the fabrication of acoustic meta-materials, which are designed to control the propagation of sound waves in specific ways, such as by allowing certain frequencies to pass through while blocking others, or by directing sound waves in specific directions. These materials are often made using a combination of materials, such as metals and plastics, and can be used in a variety of applications, such as soundproofing and noise reduction.

Some works have also been published on porous concrete used as a wall to enhance the absorption inside a building. In providing acoustic comfort in buildings such as hotels and apartments, the structure-borne sound sources responsible for radiating noise inside the building must also be tackled.

In this Special Issue, we welcome any research that contributes to the enhancement of acoustic comfort in buildings.

The sub-themes of this topic include, but are not limited to, the following:

  1. Sound insulation;
  2. Sound absorption;
  3. Room acoustics;
  4. Speech intelligibility;
  5. Noise control;
  6. Vibration control;
  7. Architectural acoustics.

We welcome a broad range of article types, including original research, systematic reviews, methods, hypotheses and theories, perspectives, and brief research reports.

Dr. Azma Putra
Dr. Iwan Prasetiyo
Dr. Kim Hung Mo
Dr. Nazli Che Din
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • building acoustics
  • acoustic materials
  • sound insulation
  • sound absorption
  • noise control
  • architectural acoustics
  • speech intelligibility
  • environmental noise

Published Papers (2 papers)

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Research

13 pages, 11402 KiB  
Article
Investigation of the Effectiveness of the Chancel Availability and Geometry of Four Traditional Churches in Malaysia: Simulation Experiment
by Cheryl Yew Shyh-Qi, Nurul Amira Abd Jalil, Nazli Bin Che Din, Chandramouli Pradeepa, Azma Putra and Waqar Azeem
Buildings 2023, 13(4), 1061; https://doi.org/10.3390/buildings13041061 - 18 Apr 2023
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Abstract
Two significant spaces define the soundscape of worship in a church: chancel and nave. The chancel is a space with the primary function of a sound source, where the preachers and choir are often seated during church services. Church design and layout have [...] Read more.
Two significant spaces define the soundscape of worship in a church: chancel and nave. The chancel is a space with the primary function of a sound source, where the preachers and choir are often seated during church services. Church design and layout have changed throughout history based on the functional needs of its target congregation. Some modern churches have omitted the chancel to fit contemporary design aesthetics. The main aim of this study is to investigate the relationship between the chancel and the acoustics performance of a church. Four churches with varying geometries of circular, polygonal, and rectangular chancels were selected for this study. Two simulations of varying chancel characteristics of chancel availability and chancel geometry were conducted. The recorded speech intelligibility index (STI) and reverberation time (RT) results indicate that chancel availability and geometry significantly affect churches’ acoustic performance. The simulation of the chancel availability mainly affected speech intelligibility, where the models with chancels recorded a higher STI than the models without chancels. In terms of chancel geometry, the results of the STI of the circular chancels were more encouraging than the polygonal and rectangular chancels. Full article
(This article belongs to the Special Issue Towards Acoustic Comfort in Buildings)
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18 pages, 4091 KiB  
Article
Investigation on Minute Holes of Woven Fabrics for Wide-Band Micro-Perforated Sound Absorbers
by Gunawan, Iwan Prasetiyo, Brian Yuliarto, Azma Putra and Irianto
Buildings 2023, 13(3), 663; https://doi.org/10.3390/buildings13030663 - 2 Mar 2023
Cited by 1 | Viewed by 1238
Abstract
Woven fabric perforation is helpful to be adopted to meet the microstructure requirement of a micro-perforated panel (MPP) absorber. Unlike conventional MPP, the woven fabric micro-perforations are formed by yarn in the x (weft) and y (warp)-directions. Hence, minute holes of the MPP [...] Read more.
Woven fabric perforation is helpful to be adopted to meet the microstructure requirement of a micro-perforated panel (MPP) absorber. Unlike conventional MPP, the woven fabric micro-perforations are formed by yarn in the x (weft) and y (warp)-directions. Hence, minute holes of the MPP with a diameter of 0.1–0.3 mm or a high perforation ratio are expected to be easily fabricated, while such a specification is difficult to realize on a solid surface, as found in some studies. The study presented here focuses on the use of minute holes in MPP absorbers by woven fabrics and discusses the minute hole properties of woven fabrics and their associated absorption characteristics. Theoretical results by Maa’s model are also used to validate resulting characteristics found from the experimental investigations. It is found that minute holes with around 0.10–0.20 mm diameter have been successfully fabricated by controlling weft yarn density. The woven fabrics are capable of producing half-absorption bandwidth of up to 5000 Hz (>3 octaves), while the peak of the absorption coefficient can be more than 0.8. In addition, varying hole diameter with the order of 10−2 mm can change the absorption behavior for both peak absorption and absorption bandwidth. Such behavior is confirmed by comparing the results with the theoretical model. This study also indicates that Maa’s model is still applicable for predicting absorption of MPP developed based on woven fabric material. Full article
(This article belongs to the Special Issue Towards Acoustic Comfort in Buildings)
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