کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6954952 1451848 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Source distance determination based on the spherical harmonics
ترجمه فارسی عنوان
تعیین فاصله دور بر اساس هارمونیک های کروی
کلمات کلیدی
آرایه میکروفون، آرایه کروی، هارمونیک کروی، هولوگرافی صوتی نزدیک به میدان،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی
This paper deals with the processing of signals measured by a spherical microphone array, focusing on the utilization of near-field information of such an array. The processing, based on the spherical harmonics decomposition, is performed in order to investigate the radial-dependent spherical functions and extract their argument - distance to the source. Using the low-frequency approximation of these functions, the source distance is explicitly expressed. The source distance is also determined from the original equation (using no approximation) by comparing both sides of this equation. The applicability of both methods is first presented in the noise-less data simulation, then validated with data contaminated by the additive white noise of different signal-to-noise ratios. Finally, both methods are tested for real data measured by a rigid spherical microphone array of radius 0.15 m, consisting of 36 microphones for a point source represented by a small speaker. The possibility of determination of the source distance using low-order spherical harmonics is shown.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 85, 15 February 2017, Pages 993-1004
نویسندگان
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