Thursday, March 21, 2019

A Novel Empirical Approach to Estimate the Acoustic Properties of Smart Materials: Part I- Open access Journals- Juniper Publishers


Juniper publishers- Academic Journal of Polymer Science
Authored by Francesca Nanni
A Novel Empirical Approach to Estimate the Acoustic Properties of Smart Materials
In this work, a novel empirical approach to the estimation of the rheological behaviour of smart materials from the sound insulation capabilities is proposed. The testing protocol relies on a small sound research facility that was designed with the goal of achieving a movable yet flexible measurement system, suitable for both laboratory environments and quality assurance departments.
Unlike other test protocols relying on lightweight acoustic research solutions, the proposed methodology was developed to perform acoustic tests in a diffused field environment, a test condition much closer to real life applications, and in a sufficiently wide frequency range (eg. 2 -10kHz).
The proposed test methodology was validated by means of modal analysis of the chamber and by comparison between empirical acoustical test results (insertion loss) and the expected theoretical results.
At last, as a proof of concept, it is showed how to apply the proposed protocol to the measurement of the sound insulation of a novel laminate containing a nano composite core and how to evaluate indirectly the rheological behaviour merely from acoustical data.

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