This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Impact of Manufacturing Inaccuracies on the Acoustic Performance of Sound Insulation Packages with Plate-Like Acoustic Metamaterials
ISSN: 2641-9637, e-ISSN: 2641-9645
Published September 30, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: 11th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
Thin plate-like metamaterials (e.g. membrane-type acoustic metamaterials or inhomogeneous plates) have a high potential for improving the sound transmission loss of sound insulation packages, especially in the challenging low-frequency regime. These types of metamaterials have been previously shown to achieve very high sound transmission loss values which can exceed the corresponding mass-law values considerably. However, like many other metamaterial realizations, their extraordinary acoustical performance relies on the periodicity of the sub-wavelength sized unit cells. In particular, for plate-like acoustic metamaterials (PAM) most theoretical and numerical investigations assume a perfect placement of equal added masses - an idealization which cannot be achieved in industrial manufacturing of these metamaterials. This contribution investigates the impact of randomized inaccuracies that can occur in manufacturing on the sound reduction behavior of PAM. First, a numerical model of a finite sized PAM is validated using sound transmission loss measurement data. Then, the simulation model is modified to incorporate randomly varying geometrical parameters of the added masses (such as mass placement, size, etc.). The parameters are randomized according to a Gaussian distribution and the impact of different standard deviations on the sound transmission loss is analyzed. The results indicate that while a random variation of the mass parameters does have an effect on the acoustic performance of the investigated PAM, it becomes significant only for relatively large standard deviations.
CitationLangfeldt, F. and Gleine, W., "Impact of Manufacturing Inaccuracies on the Acoustic Performance of Sound Insulation Packages with Plate-Like Acoustic Metamaterials," SAE Int. J. Adv. & Curr. Prac. in Mobility 3(2):1092-1100, 2021, https://doi.org/10.4271/2020-01-1562.
Data Sets - Support Documents
|Unnamed Dataset 1|
SAE International Journal of Advances and Current Practices in Mobility
Number: V130-99EJ; Published: 2021-04-16
Number: V130-99EJ; Published: 2021-04-16
- Ma , G. , and Sheng , P. Acoustic Metamaterials: From Local Resonances to Broad Horizons Sci. Adv. 2 2 e1501595 2016 10.1126/sciadv.1501595
- Cummer , S. , Christensen , J. , and Alù , A. Controlling Sound with Acoustic Metamaterials Nat. Rev. Mater. 21 16001 2016 10.1038/natrevmats.2016.1
- Yang , Z. , Mei , J. , Yang , M. , Chan , N. et al. Membrane-Type Acoustic Metamaterial with Negative Dynamic Mass Phys. Rev. Lett. 101 204301 2008 10.1103/PhysRevLett.101.204301
- Huang , T. , Shen , C. , and Jing , Y. Membrane- and Plate-Type Acoustic Metamaterials J. Acoust. Soc. Am. 139 6 3240 3250 2016 10.1121/1.4950751
- Liu , Z. , Zhang , X. , Mao , Y. , Zhu , Y.Y. et al. Locally Resonant Sonic Materials Science 289 1734 1736 2000 10.1126/science.289.5485.1734
- Langfeldt , F. , Gleine , W. , and von Estorff , O. An Efficient Analytical Model for Baffled, Multi-Celled Membrane-Type Acoustic Metamaterial Panels J. Sound Vib. 417 359 375 2018 10.1016/j.jsv.2017.12.018
- Henneberg , J. , Gomez Nieto , J.S. , Sepahvand , K. , Gerlach , A. et al. Periodically Arranged Acoustic Metamaterial in Industrial Applications: The Need for Uncertainty Quantification Appl. Acoust. 157 107026 2020 10.1016/j.apacoust.2019.107026
- De Langhe , K. , Peiffer , A. , Boeykens , R. , and Moser , C. Sound Transmission Loss Predictions of Aircraft Panels: An Update on Recent Technology Evolutions INTER-NOISE 2016 Germany Aug. 21-24 2016
- Robin , O. and Berry , A. Alternative Methods for the Measurement of Panel Transmission Loss under Diffuse Acoustic Field Excitation INTER-NOISE 2016 Germany Aug. 21-24 2016
- Langfeldt , F. and Gleine , W. Improved Sound Transmission Loss of Glass Wool with Acoustic Metamaterials ICSV26 Canada July 7-11 2019