Acoustic Properties of Additive Manufactured Porous Material

Akiwate, Deepak C.; Date, Mahendra D.; Venkatesham, B; Suryakumar, S.

doi:10.1007/978-981-15-5776-7_12

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…Natural materials are an effective alternative to synthetic ones due to their low cost and lower environmental impact. Akiwate D. et al (2019) [26] examined the acoustic properties of porous materials produced by 3D printing. Labašová E. and Ďuriša R. (2019) [27] evaluated the sound absorption coefficient for various single-layer and two-layer materials (cork, felt, polyethylene).…”

Section: Introductionmentioning

confidence: 99%

Analysis and Research on the Use of Bulk Recycled Materials for Sound Insulation Applications

et al. 2022

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The application of recycled materials from the automotive industry in the field of the construction industry is a suitable alternative application for these materials and the use of their acoustic and thermal insulation properties. The output of recycling is granular, or chopped materials that can be used as a substitute for conventional materials. One of the important features of building materials is their acoustic properties. The measurement and evaluation of acoustic properties is carried out using an impedance tube as equipment. Measuring compact materials is quite simple and requires the preparation of a sample. Measuring the acoustic properties of granular bulk materials is more complicated and requires the development and production of a special test cartridge. Recycled bulk materials from the automotive industry such as rubber granules and chopped textiles can be applied as fillings for dividing structures. The aim of this paper was to assess the acoustic properties of different fractions of recycled rubber granules and textile chopped material and to compare acoustic properties with compact rubber and textile panels. To evaluate and compare sound absorption coefficient (α) and sound transmission loss (R) parameters, we used basic statistical methods and hypothesis testing methods. The production of compact panels is quite expensive since it is necessary to use special synthetic binders in production, and the content of these substances can also have negative effects on the environment. Based on the results of measuring the acoustic properties of bulk recycled materials and comparing them with compact materials, we can conclude that bulk recycled rubber and textile materials have very good values for their acoustic properties, which enables them to be used in several areas of industry.

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Section: Introductionmentioning

confidence: 99%

Analysis and Research on the Use of Bulk Recycled Materials for Sound Insulation Applications

et al. 2022

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Sound absorption performance of helically perforated porous metamaterials at high temperature

2023

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The potential of additively manufactured porous absorbers in the design of multi-layer microperforated absorbers

Berchtenbreiter,

Renz,

Becker

2024

Acta Acust.

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Microperforated absorbers (MPA) are a well-established technology for attenuating sound in flow carrying ducts. MPAs usually consist of a microperforated panel (MPP) in combination with a cavity as back volume. The damping maxima of MPAs occur in the range of their resonant frequencies and the effect is narrowband compared to porous or fibrous absorbers, which damp broadband at high frequencies. The resonant frequencies of MPAs decrease with increasing back volume. This provides a challenge, especially in applications with limited installation space when the damping of low frequencies is required. In the literature, the combination of MPPs and porous or fibrous absorbers is reported to reduce the required back volume. Therefore, double-layer MPAs with an additively manufactured porous absorber underneath the MPP are introduced in this work. The advantage of using additively manufactured porous absorbers as an acoustic metamaterial over conventional absorbers is that the acoustic properties can be specifically adapted to the required impedance boundary conditions. The results of this work show that the additively manufactured absorbers reduce the required back volume by up to 13% compared with liners without absorber underneath the MPP. Experimental validation underscores the robustness of the chosen design approach for double-layer MPAs.

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Acoustic Properties of Additive Manufactured Porous Material

Cited by 5 publications

References 9 publications

Analysis and Research on the Use of Bulk Recycled Materials for Sound Insulation Applications

Analysis and Research on the Use of Bulk Recycled Materials for Sound Insulation Applications

Sound absorption performance of helically perforated porous metamaterials at high temperature

The potential of additively manufactured porous absorbers in the design of multi-layer microperforated absorbers

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