Special Issue "Advances in Architectural Acoustics"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: 31 December 2020.

Special Issue Editors

Dr. Nikolaos M. Papadakis
Website
Guest Editor
Technical University of Crete, Institute of Computational Mechanics and Optimization (Co.Mec.O), GR-73100 Chania, Greece
Interests: Architectural Acoustics, Computational Acoustics, Psychoacoustics, Environmental Acoustics
Prof. Dr. Massimo Garai
Website
Guest Editor
Department of Industrial Engineering, University of Bologna, Viale Risorgimento 2, Bologna, Italy
Interests: environmental acoustics; architectural acoustics; building acoustics; noise control
Prof. Dr. Stavroulakis Georgios
Website
Guest Editor
School of Production Engineering and Management, Technical University of Crete, GR-73100 Chania, Greece
Interests: computational mechanics and optimization; structural control and identification

Special Issue Information

Dear Colleagues,

Satisfactory acoustics is crucial for the ability of spaces such as auditoriums and lecture rooms to perform their primary function. The acoustics of dwellings and offices greatly affects the quality of our life, since we are all consciously or subconsciously aware of the sounds to which we are daily subjected. Architectural acoustics, which encompasses room and building acoustics, is the scientific field that deals with these topics and can be defined as the study of generation, propagation, and effects of sound in enclosures. Modeling techniques, as well as related acoustic theories for accurately calculating the sound field, have been the center of many major new developments. In addition, the image conveyed by a purely physical description of sound would be incomplete without regarding human perception; hence, the interrelation between objective stimuli and subjective sensations is a field of important investigations.

 

A holistic approach in terms of research and practice is the optimum way for solving the perplexing problems which arise in the design or refurbishment of spaces, since current trends in contemporary architecture, such as transparency, openness, and preference for bare sound-reflecting surfaces are continuing pushing the very limits of functional acoustics. The aim of this Special Issue is to gather advances in architectural acoustics, which we hope could inspire researchers and acousticians to explore new directions in this age of scientific convergence. In the Special Issue, we welcome both original research papers and review articles based on diverse topics, with architectural acoustics as a reference point, such as:

  • Computational acoustics;
  • Auralization;
  • Acoustic measurements;
  • Sound sources;
  • Sound absorbers and diffusers;
  • Acoustic comfort, annoyance;
  • Intelligibility of speech in rooms;
  • Design of concert or conference halls;
  • Historical halls acoustics;
  • Worship spaces acoustics.

Scientists working in this broad field are invited to present their work.

Dr. Nikolaos M. Papadakis
Prof. Dr. Massimo GARAI
Prof. Dr. Georgios E. Stavroulakis
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 papers will be 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. Applied Sciences is an international peer-reviewed open access semimonthly 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 1800 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.

Published Papers (4 papers)

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Research

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Open AccessArticle
Time Domain Room Acoustic Solver with Fourth-Order Explicit FEM Using Modified Time Integration
Appl. Sci. 2020, 10(11), 3750; https://doi.org/10.3390/app10113750 - 28 May 2020
Abstract
This paper presents a proposal of a time domain room acoustic solver using novel fourth-order accurate explicit time domain finite element method (TD-FEM), with demonstration of its applicability for practical room acoustic problems. Although time domain wave acoustic methods have been extremely attractive [...] Read more.
This paper presents a proposal of a time domain room acoustic solver using novel fourth-order accurate explicit time domain finite element method (TD-FEM), with demonstration of its applicability for practical room acoustic problems. Although time domain wave acoustic methods have been extremely attractive in recent years as room acoustic design tools, a computationally efficient solver is demanded to reduce their overly large computational costs for practical applications. Earlier, the authors proposed an efficient room acoustic solver using explicit TD-FEM having fourth-order accuracy in both space and time using low-order discretization techniques. Nevertheless, this conventional method only achieves fourth-order accuracy in time when using only square or cubic elements. That achievement markedly impairs the benefits of FEM with geometrical flexibility. As described herein, that difficulty is solved by construction of a specially designed time-integration method for time discretization. The proposed method can use irregularly shaped elements while maintaining fourth-order accuracy in time without additional computational complexity compared to the conventional method. The dispersion and dissipation characteristics of the proposed method are examined respectively both theoretically and numerically. Moreover, the practicality of the method for solving room acoustic problems at kilohertz frequencies is presented via two numerical examples of acoustic simulations in a rectangular sound field including complex sound diffusers and in a complexly shaped concert hall. Full article
(This article belongs to the Special Issue Advances in Architectural Acoustics)
Open AccessArticle
Potential of Room Acoustic Solver with Plane-Wave Enriched Finite Element Method
Appl. Sci. 2020, 10(6), 1969; https://doi.org/10.3390/app10061969 - 13 Mar 2020
Abstract
Predicting room acoustics using wave-based numerical methods has attracted great attention in recent years. Nevertheless, wave-based predictions are generally computationally expensive for room acoustics simulations because of the large dimensions of architectural spaces, the wide audible frequency ranges, the complex boundary conditions, and [...] Read more.
Predicting room acoustics using wave-based numerical methods has attracted great attention in recent years. Nevertheless, wave-based predictions are generally computationally expensive for room acoustics simulations because of the large dimensions of architectural spaces, the wide audible frequency ranges, the complex boundary conditions, and inherent error properties of numerical methods. Therefore, development of an efficient wave-based room acoustic solver with smaller computational resources is extremely important for practical applications. This paper describes a preliminary study aimed at that development. We discuss the potential of the Partition of Unity Finite Element Method (PUFEM) as a room acoustic solver through the examination with 2D real-scale room acoustic problems. Low-order finite elements enriched by plane waves propagating in various directions are used herein. We examine the PUFEM performance against a standard FEM via two-room acoustic problems in a single room and a coupled room, respectively, including frequency-dependent complex impedance boundaries of Helmholtz resonator type sound absorbers and porous sound absorbers. Results demonstrated that the PUFEM can predict wideband frequency responses accurately under a single coarse mesh with much fewer degrees of freedom than the standard FEM. The reduction reaches O ( 10 2 ) at least, suggesting great potential of PUFEM for use as an efficient room acoustic solver. Full article
(This article belongs to the Special Issue Advances in Architectural Acoustics)
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Open AccessArticle
A Parametric Study of the Acoustic Performance of Resonant Absorbers Made of Micro-perforated Membranes and Perforated Panels
Appl. Sci. 2020, 10(5), 1581; https://doi.org/10.3390/app10051581 - 26 Feb 2020
Abstract
Sound absorbing surfaces are being increasingly requested for the acoustical treatment of spaces, like offices and restaurants, where high aesthetic standards are requested. In these cases, perforated and micro-perforated panels may represent the ideal solution in terms of low maintenance, durability, and mechanical [...] Read more.
Sound absorbing surfaces are being increasingly requested for the acoustical treatment of spaces, like offices and restaurants, where high aesthetic standards are requested. In these cases, perforated and micro-perforated panels may represent the ideal solution in terms of low maintenance, durability, and mechanical resistance. In addition, such a solution might be conveniently realized while using optically transparent panels, which might offer extra value, as they could ensure visual contact, while remaining neutral in terms of design. The paper first investigates the reliability of prediction models by comparison with measured data. Subsequently, while taking advantage of a parametric optimization algorithm, it is shown how to design an absorber covering three octave bands, from 500 Hz to 2 kHz, with an average sound absorption coefficient of about 0.8. Full article
(This article belongs to the Special Issue Advances in Architectural Acoustics)
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Review

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Open AccessReview
Review of Acoustic Sources Alternatives to a Dodecahedron Speaker
Appl. Sci. 2019, 9(18), 3705; https://doi.org/10.3390/app9183705 - 06 Sep 2019
Cited by 2
Abstract
An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen acoustic source alternatives to a dodecahedron speaker are [...] Read more.
An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen acoustic source alternatives to a dodecahedron speaker are presented while emphasis is placed on features such as omnidirectionality, repeatability, adequate sound pressure levels, even frequency response, accuracy in measurement of acoustic parameters and fulfillment of ISO 3382-1 source requirements. Some of the alternative acoustic sources have the appropriate features to provide usable results for acoustic measurements, some have acoustic characteristics better than a dodecahedron speaker (e.g., omnidirectionality in the high-frequency range), while some can potentially fulfill the ISO 3382-1 source requirements. Collected data from this review can be used in many areas (e.g., ISO measurements, head-related transfer functions measurements) for the appropriate selection of an acoustic source according to the expected use. Finally, suggestions for uses and future work are given aimed at achieving further advances in this field. Full article
(This article belongs to the Special Issue Advances in Architectural Acoustics)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Submitted papers (currently under peer review process)
1. Dario D’Orazio: ‘The acoustic performance of Italian-style opera houses: a review’.
2. Louena Shtrepi, Sonja Di Blasio, Arianna Astolfi:
‘Listeners sensitivity to different locations of diffusive surfaces in performance spaces: the case of a shoebox concert hall’.

Planned papers - verified (to be submitted in the following weeks) 
1. Paper from Dr. Francesco Aletta
2. Paper from Professor Massimo Garai

Planned papers More authors (6 so far) have expressed their intent to publish in the Special Issue. Papers will be announced in the web site of the Special Issue as soon as they are published.
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