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Applied Sciences
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New Advances in Acoustic Materials: Design and Application
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New Advances in Acoustic Materials: Design and Application

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

Deadline for manuscript submissions: 20 October 2025 | Viewed by 1664

Special Issue Editor

Prof. Dr. Massimo Viscardi

E-Mail Website
Guest Editor
Department of Industrial Engineering, Aerospace Section, University of Naples “Federico II”, Via Claudio 21, 80125 Naples, Italy
Interests: vibration analysis; mechanical engineering; acoustics; acoustic signal processing; structural vibration; modal analysis; structural dynamics; finite element modeling; composite materials; acoustic materials; nature-based materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue showcases cutting-edge advancements in the field of acoustic materials, focusing on their design principles and diverse applications across various industries. As our world becomes increasingly noise-centric, the demand for efficient, tailored acoustic solutions has intensified. This Special Issue brings together interdisciplinary research contributions that explore novel approaches to the design and practical application of acoustic materials.

The topics covered in this Special Issue include:

  • Smart Materials for Acoustic Control: Investigating the integration of smart materials, such as metamaterials and shape-memory alloys, in acoustic material design for the enhanced control and manipulation of sound waves.
  • Bio-inspired and Sustainable Acoustic Materials: Exploring nature-inspired materials, such as biomimetic structures and materials, that mimic natural sound absorption and diffusion mechanisms. Conjunctively, attention will be dedicated to bio-based materials alongside those derived by the valorization of circular-economy processes.
  • Nanotechnology in Acoustic Materials: Examining nanotechnology’s role in the development of acoustic materials with unique properties, such as enhanced sound absorption, reduced weight, and improved mechanical strength.
  • Multifunctional Acoustic Materials: Discussing the design and application of materials that serve multiple functions, such as combining acoustic insulation with thermal properties or incorporating energy-harvesting capabilities.
  • 3D Printing and Acoustic Materials: Analyzing the impact of 3D printing technologies on the customization and fabrication of acoustic materials, enabling the production of complex structures tailored to specific acoustic requirements.
  • Current and Emerging Applications in Industry: Presenting case studies and practical applications of acoustic materials in diverse fields, including architecture, automotive design, aerospace, consumer electronics, and healthcare.

By bringing together these diverse perspectives, this Special Issue aims to foster collaboration between researchers, engineers, and practitioners in the field of acoustic materials, enabling innovative solutions that address the challenges associated with noise control and acoustic design.

Prof. Dr. Massimo Viscardi
Guest Editor

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. 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 2400 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

  • acoustic materials
  • material technologies
  • advance and sustainable material technologies
  • transport
  • building acoustic

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Published Papers (2 papers)

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Research

23 pages, 15421 KiB  
Article
Evaluation of a Microporous Acoustic Liner Using Advanced Noise Control Fan Engine
by Bharath Kenchappa and Kunigal Shivakumar
Appl. Sci. 2025, 15(9), 4734; https://doi.org/10.3390/app15094734 - 24 Apr 2025
Viewed by 242
Abstract
A novel microstructurally controlled graded micro-porous material was developed and experimentally validated for noise reduction through a normal incidence impedance test. Extensive parametric studies were conducted to understand the influence of test specimen size, particle size, porosity, pore size, and its distribution on [...] Read more.
A novel microstructurally controlled graded micro-porous material was developed and experimentally validated for noise reduction through a normal incidence impedance test. Extensive parametric studies were conducted to understand the influence of test specimen size, particle size, porosity, pore size, and its distribution on acoustic absorption and transmission loss. Based on previous research, this study evaluates the application of graded microporous material as an acoustic liner technology for aircraft turbomachine engines. The liner was fabricated in eight 45° segments, assembled in an aluminum test rig, and tested on NASA Glenn Research Center’s Advanced Noise Control Fan (ANCF) low-speed test bed for tonal and broadband noise. The study demonstrates that microstructurally controlled graded microporous material is very effective in dissipating sound energy with reductions in tonal sound pressure level (SPL) of 2 to 13 dB at blade passing frequencies and reductions in broadband SPL of about 2 to 3 dB for the shaft order greater than 40. While the proposed two-layer graded liner model successfully validated the concept, additional design optimization is needed to enhance performance further. This work highlights the potential of graded microporous material as next-generation acoustic liners, offering lightweight, efficient, and scalable aircraft engine noise reduction solutions. Full article
(This article belongs to the Special Issue New Advances in Acoustic Materials: Design and Application)
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26 pages, 7747 KiB  
Article
Design of a Noise Mitigation System Using Lightweight Graded Micro-Porous Material
by Bharath Kenchappa and Kunigal Shivakumar
Appl. Sci. 2024, 14(23), 11008; https://doi.org/10.3390/app142311008 - 27 Nov 2024
Viewed by 835
Abstract
Noise is a concern in industries like aviation. Existing acoustic materials have limitations in terms of effective broadband sound attenuation and operating conditions. This work addresses these limitations by designing and developing a noise mitigation system using lightweight graded micro-porous material made from [...] Read more.
Noise is a concern in industries like aviation. Existing acoustic materials have limitations in terms of effective broadband sound attenuation and operating conditions. This work addresses these limitations by designing and developing a noise mitigation system using lightweight graded micro-porous material made from Cenospheres and high-char binder. However, Cenospheres are nearly spherical with rough surfaces, so determining the flow properties of sound propagation is challenging, and direct measurements are expensive. We developed a multivariable-fit inverse method to estimate these properties using an experimental absorption coefficient, validated first with smooth-surface glass beads and then applied to micro-porous material. The determined flow properties were used in a predictive acoustic analysis and validated experimentally. It was demonstrated that a microstructurally graded material is needed to optimize both sound absorption and transmission loss. A graded material system designed for turbofan engine acoustic liners (50 mm thick) met the target broadband sound absorption coefficient of ≥0.50 and transmission loss of ≥20 dB above 500 Hz. The study also highlights that larger particles in thicker layers enhance sound absorption, while a graded micro-structure improves overall acoustic performance. This research offers a novel approach for designing a lightweight acoustic material for aviation, marking a breakthrough in passive noise mitigation technology. Full article
(This article belongs to the Special Issue New Advances in Acoustic Materials: Design and Application)
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