Origami-Inspired Adaptive Acoustic Tank for Optimal Reflection Mitigation

Roee DIamant, Ilan Shahar, Tamir Rosenberg, Avi Weiss

Research output: Contribution to journalArticlepeer-review

Abstract

The periodic calibration and testing of acoustic sensors, often involve extensive measurements in acoustic tanks. These are usually small facilities whose boundaries are covered with phono-absorption material to suppress reflections. The characteristics of such tanks are defined by the design of absorption planes and the choice of phono-absorption material. Since these characteristics are fixed, an acoustic tank may suppress reflections only for a certain frequency range and setup of the acoustic sensors within the tank, thereby limiting the applications supported by the tank. In this paper, we describe a novel design of an acoustic tank whose absorption characteristics are made adjustable. Inspired by Origami paper folding, this is achieved by changing the shape of the absorption plates with a single degree of freedom. Performing channel estimation between a projector and hydrophone for a required frequency range, the adjustment of the plates involves an iterative genetic-based optimization that finds the best Pareto front to maximize reflection mitigation. We report results from a prototype we contracted that shows a fast convergence of the tank to the best reflection suppression for frequency ranges of 20-30kHz and 35-40kHz. The outcome is an acoustic tank that adapts to various tested frequency ranges and setup of sensors, and can thus improve productivity of acoustic sensor calibration and testing in an efficient manner.

Original languageEnglish
Article number9146269
Pages (from-to)15193-15203
Number of pages11
JournalIEEE Sensors Journal
Volume20
Issue number24
DOIs
StatePublished - 15 Dec 2020

Bibliographical note

Funding Information:
Manuscript received June 27, 2020; accepted July 16, 2020. Date of publication July 22, 2020; date of current version November 18, 2020. This work was supported in part by the Israeli Ministry of Energy under Grant 219-17-013. The associate editor coordinating the review of this article and approving it for publication was Prof. Bernhard Jakoby. (Corresponding author: Roee Diamant.) Roee Diamant and Ilan Shahar are with the Department of Marine Technologies, University of Haifa, Haifa 3498838, Israel (e-mail: roee.d@univ.haifa.ac.il; ishachar3@staff.haifa.ac.il).

Publisher Copyright:
© 2001-2012 IEEE.

Keywords

  • Underwater acoustic signal processing
  • acoustic tank
  • adaptive geometry control
  • channel estimation
  • genetic algorithm
  • origami inspired mechanism
  • phonetic materials

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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