Submitted to: ASABE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 7/17/2017
Publication Date: 7/17/2017
Citation: Pelletier, M.G., Holt, G.A., Wanjura, J.D. 2017. Simplified through-transmission test method for determination of a material's acoustic properties. ASABE Annual International Meeting. ASABE Presentation.
Technical Abstract: Accepted acoustic testing standards are available; however, they require specialized hardware and software that are typically out of reach economically to the occasional practitioner. What is needed is a simple and inexpensive screening method that can provide a quick comparison for rapid identification of the top candidates. This research reports on the development of an acoustical rapid-test method that achieves these objectives. The method is based upon a reformulation of the well regarded three-microphone method. The new formulation reduces the number of required microphones to a single microphone and removes the need for simultaneous capture and extensive signal-processing analysis. The study compares the proposed simplified method to two standard methods and the three-microphone method. The results of the correlation analysis between the new method, versus the original method produced a coefficient of determination of r2=0.994. A simulation study high-lighted several unique accuracy advantages of this new proposed method in comparison to the existing standard methods. The proposed new method represents an easy to use technique that requires little in the way of equipment and can be setup with minimal training and expenses.