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Technical Brief

Optimized Finite Element Method for Acoustic Scattering Analysis with Application to Head-Related Transfer Function Estimation

[+] Author and Article Information
Mahdi Farahikia

PhD Candidate, Vibrations and Acoustics Laboratory, Department of Mechanical Engineering, Binghamton University SUNY, Binghamton, New York 13902
mfarahi1@binghamton.edu

Quang Su

Assistant Professor, Vibrations and Acoustics Laboratory, Department of Mechanical Engineering, Binghamton University SUNY, Binghamton, New York 13902
qsu@binghamton.edu

1Corresponding author.

ASME doi:10.1115/1.4035813 History: Received July 15, 2016; Revised January 05, 2017

Abstract

Obtaining Head-Related Transfer Functions (HRTFs) is a challenging task, in spite of its importance in localizing sound in a 3D environment or improving the performance of hearing aids, among their various applications. In this paper, an optimized finite element method through adaptive dimension size based on wavelength (frequency) for acoustic scattering analyses using ANSYS is presented. Initial investigation of the validity of our method is conducted by simulating scattered sound field for a solid sphere exposed to a far-field plane sound wave at 100 (equally spaced in logarithmic scale) frequencies between 20 and 20k Hz. Comparison of the equivalent HRTF results between the two methods shows a maximum deviation of less than 0.6 dB between our method and the analytical solution depending on the angle of rotation of the sphere with respect to sound source.

Copyright (c) 2017 by ASME
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