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Acoustic metamaterial panels for sound attenuation in the 50–1000 Hz regime
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10.1063/1.3299007
/content/aip/journal/apl/96/4/10.1063/1.3299007
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/4/10.1063/1.3299007
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Transmission spectra of a single circular cell (red curve) with an attached mass of 0.11 g, and Sample-1 (blue curve) with an attached mass of 0.71 g. The left hand inset shows the front view of a planar array of square unit cells. The right hand inset shows the front view of a single circular cell. (b) The measured displacement amplitude of vibration field in a circular cell with a mass of 0.11 g at the center, at the transmission dip frequency of 719 Hz. In the inset the averaged displacement is plotted as a function of frequency. The curve crosses zero at the transmission dip frequency. Thus the membrane is a reflection nodal point, on average, at the near-total reflection frequency.

Image of FIG. 2.
FIG. 2.

The STL spectra of two nominally identical single-layer samples (red and green curves), together with the STL spectrum measured from the stacking of the two samples (blue curve). The purple curve is the STL spectrum of a broadband shield consisting of four single-layer panels. Detailed composition of the shield is given in the text.

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/content/aip/journal/apl/96/4/10.1063/1.3299007
2010-01-26
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acoustic metamaterial panels for sound attenuation in the 50–1000 Hz regime
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/4/10.1063/1.3299007
10.1063/1.3299007
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