A robust technique to reconstruct sound field for all wave-numbers

来源 :Science in China(Series E:Technological Sciences) | 被引量 : 0次 | 上传用户:listen342325
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A robust technique has been proposed for reconstructing sound field for all wave-numbers, which is suitable for the radiation analysis on an arbitrarily-shaped body. According to the wave superposition formulation, the spatial sound field of an actual radiator can be represented equivalently by superposing the fields generated by some fictitious sources interior to the actual radiator. Meanwhile, the strength density on the fictitious sources can be obtained by matching the sound pressures of a finite number of field points. Once the strength density is calculated, the acoustic information at any field point can be obtained subsequently. Finally, some typical numerical examples are given to validate the theoretical analysis, and some investigations are made to analyze the influence of sound frequency and the fictitious source position on the reconstruction precision, which are helpful to the application of the proposed technique to real industrial measurements. A robust technique has been proposed for reconstructing sound field for all wave-numbers, which is suitable for the radiation analysis on an arbitrarily-shaped body. According to the wave superposition formulation, the spatial sound field of an actual radiator can be equivalently by by The strength generated by the fictitious sources can be obtained by matching the sound pressures of a finite number of field points. Finally, some typical numerical examples are given to validate the theoretical analysis, and some investigations are made to analyze the influence of sound frequency and the fictitious source position on the reconstruction precision, which are helpful to the application of the proposed technique to real industrial measurements.
其他文献
“堂皇杯”钢琴比赛如期进行,比赛地点是在华地公司五楼的“仙人掌”咖啡厅。那是一个十分优雅、十分高贵的地方。我抽到的是17号签,虽然在后面,但我仍然非常紧张,心里像揣了
据近年卫生部卫生统计信息中心统计,农村居民死因排序为:1.呼吸系统疾病;2.脑血管疾病;3.恶性肿瘤;4.心脏病;5.损伤和中毒;6.消化系统疾病;7.泌尿、生殖系统疾病;8.肺结核;9.新生儿病210.传染病(除肺结核)。前十
After analyzed Fourth Order Cumulant (FOC) of harmonic signals theoretically, the FOC is divided into three parts. The first is the cubic frequency (phase) cou
目前 ,我国中学生视力状况不尽如人意 ,近视率有增无减 ,给学生的升学就业带来了不良影响。为掌握中学生视力低下变化情况 ,为今后开展学生“防近”工作 ,给控制中学生的视力
随着人口的老龄化 ,高血压脑出血患者的发病率越来越高 ,严重威胁着人们的生命。为了提高救治成活率 ,减少外科手术后的并发症 ,我国卫生部提倡以颅内血肿微创清除术治疗高血
Landslide inventory plays an important role in recording landslide events and showing their temporal-spatial distribution. This paper describes the development,
目前有部分教师单纯地将班级管理看作对班级活动的管理,认为不是集体活动就不存在班级管理,对此观点笔者认为是有失偏颇的。所谓的班级管理指的就是班级教育管理者(班主任)带
目的 :通过了解湖南省居民 1988~ 1998年死因变化情况 ,为预防和治疗疾病提供依据。方法 :研究湖南省 1988~ 1998年间死因资料。结果 :主要死因顺位为循环系统疾病、肿瘤、呼吸
自2005年7月21日中国人民银行宣布人民币升值2%以来,人民币汇率持续走高。总体上看,对进口企业比较有利,但对出口企业有一定压力。 Since July 21, 2005, when the People’
脸谱化对手、神圣化自我的倾向,是美国决策的一个突出特点和弱点朝鲜战争是二战后美国在亚洲通过军事手段遏制“共产主义扩张”的具体尝试,也是冷战后美国全球战略目标与政