Acoustic Properties of Additive Manufactured Porous Material

Akiwate, D. and Date, M. and Venkatesham, B. and Suryakumar, S. (2021) Acoustic Properties of Additive Manufactured Porous Material. In: 46th National Symposium on Acoustics, NSA 2017, 28 October 2017 to 30 October 2017, Aligarh.

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Acoustic porous materials are extensively used in many engineering applications like building, automobile, aviation, and marine. The health risk factor and environmental claims, associated with traditional materials such as glass wool, mineral fibers, and polymer foams demand for the alternative porous acoustic absorbing materials. Advances in additive manufacturing (AM) allow to manufacture complex structures and give an alternative method to produce porous materials. This study investigates the acoustic properties of porous sound-absorbing material produced by using additive manufacturing (AM) technique and explores the feasibility of AM to manufacture acoustic absorptive materials. For study, three samples with different aperture ratios were fabricated by AM technique, and their sound absorption coefficients were measured experimentally by using the impedance tube. The theoretical formulation for predicting normal sound absorption coefficient of sample with and without air gap was developed and compared with experimental results. The predicted absorption coefficient agrees well with measured results. The measured results indicate that the absorption coefficient of the structures fabricated through AM can be altered by varying aperture ratio and air gap behind the sample. This study reinforces the capability of AM for producing complex acoustic structures with better acoustic properties.

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IITH Creators:
IITH CreatorsORCiD
Simhambhatla, Suryakumar
Item Type: Conference or Workshop Item (Paper)
Additional Information: Series Title: Lecture Notes in Mechanical Engineering
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Mrs Haseena VKKM
Date Deposited: 09 Nov 2021 05:28
Last Modified: 31 May 2022 10:07
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