کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
760904 1462422 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Patch nearfield acoustic holography in a moving medium
ترجمه فارسی عنوان
پلاگین هولوگرافی صوتی در نزدیکی فیلد در یک رسانه حرکتی
کلمات کلیدی
پچ هولوگرافی آکوستیک نزدیک زمین، متوسط ​​حرکت، استخراج صوت میدان، اثرات جریان
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Patch NAH was applied to the case in a moving medium.
• The flow effects were considered fully in the process of sound field extrapolation.
• Simulations verified the validity and stability of patch NAH in a moving medium.

To realize the accurate reconstruction of sound field in a moving medium under the condition of limited holographic aperture, a patch nearfield acoustic holography (NAH) in a moving medium is proposed. The proposed method not only reduces the influence caused by the limited aperture effects through sound field extrapolation, but also perfectly suits for sound field reconstruction in a moving medium by improving the shape of the modified Tikhonov regularization filter and the noise estimation method in accordance with flow effects. In the method, two cases that the flow direction is parallel to and perpendicular to the hologram surface are considered. Especially in the perpendicular case, the expression of the wavenumber component in the z direction is improved to make the proposed method suitable for the moving medium at a high Mach number. Simulations are investigated to examine the performance of the proposed method and show its advantages by comparing with NAH in a moving medium and the conventional patch NAH. It is found that, the proposed method is effective and robust at different flow velocities of the medium and different frequencies of the sound source.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 86, December 2014, Pages 71–79
نویسندگان
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