National Taiwan Ocean University Institutional Repository:Item 987654321/40293
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28603/40634
Visitors : 4393679      Online Users : 439
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40293

Title: Spherical Acoustical Holography of Low-Frequency Noise Sources
Authors: J.C.Lee
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: Acoustics;spherical holography
Date: 1996-05
Issue Date: 2017-01-17T03:38:46Z
Publisher: Journal of Applied Acoustics
Abstract: Abstract:The performance of near-field reconstruction at low frequency using spherical holographic techniques is investigated. The spherical Hankel function with small argument (near-field and low frequency) has divergent behaviour in the near-field. This divergent phenomenon influences the precision of holographic reconstruction. Two computer simulations based on the derived equations are used to demonstrate the capability of holography to construct the source surface pressure and particle velocity for noise source identification.
The results of multipole source simulation show that the precision of backward holography to the near-field depends on using the optimum order of holographic wave. Analysis of another simulation shows that more precise reconstruction of source surface pressure and particle velocity can be obtained from original pressure data at a smaller radius.
Relation: 48(91), pp.85-95
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40293
Appears in Collections:[Department of Marine Engineering] Periodical Articles

Files in This Item:

File Description SizeFormat
1-s2.0-0003682X9500068K-main.pdf643KbAdobe PDF33View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback