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Title: Simultaneous evaluation of acoustic nonlinearity parameter and attenuation coefficients using the finite amplitude method

A novel method to determine acoustic parameters involved in measuring the nonlinearity parameter of fluids or solids is proposed. The approach is based on the measurement of fundamental and second harmonic pressures with a calibrated receiver, and on a nonlinear least squares data-fitting to multi-Gaussian beam (MGB) equations which explicitly define the attenuation and diffraction effects in the quasilinear regime. Results obtained in water validate the proposed method. The choice of suitable source pressure is discussed with regard to the quasilinear approximation involved. The attenuation coefficients are also acquired in nonlinear regime and their relations are discussed.
Authors:
;  [1] ; ;  [2]
  1. School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan, 410075 (China)
  2. Division of Mechanical and Automotive Engineering, Wonkwang University, Iksan, Jonbuk 570-749 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22493946
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 7; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; APPROXIMATIONS; ATTENUATION; DIFFRACTION; EQUATIONS; EVALUATION; FLUIDS; LEAST SQUARE FIT; NONLINEAR PROBLEMS; SOLIDS; WATER