What question did this study set out to answer?

Investigate how acoustic vibrations propagate through granular media and determine the frequency response of individual particles under external oscillation.

April 13, 1992Physical Review Letters

Sound in sand

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Authors

CLChu-heng LiuPalo Alto Research Center SNSidney R. NagelAmerican Institutes for Research

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Implication

Experimental study reveals anomalous noisy vibration spectra in granular media, indicating that sound propagation depends directly on microscopic particle packing.

Key Points

Investigate how acoustic vibrations propagate through granular media and determine the frequency response of individual particles under external oscillation.
Measured single-particle vibrational responses across packed bead configurations subjected to external oscillations over a wide frequency range.
Single-particle vibrations exhibited an exceedingly noisy power spectrum scaling as S(f) ∝ f^2.2 spanning more than 5 decades in frequency.
The frequency response depended sensitively on the microscopic packing configuration of beads, mirroring conductance fluctuations observed in mesoscopic metals.

Cite This Study

Liu et al. (1992) studied this question.

synapsesocial.com/papers/6a72c2a9c1a24a6142dbe35d https://doi.org/10.1103/physrevlett.68.2301

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Implication

Experimental study reveals anomalous noisy vibration spectra in granular media, indicating that sound propagation depends directly on microscopic particle packing.

Sound in sand

Discussion

Member takes

Implication

Key Points

Cite This Study

Sound in sand

Discussion

Member takes

Implication

Key Points

Cite This Study

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