Frequency domain solution of a rotating point source in an infinite duct 圆管内旋转点声源声学频域分析
To validate the scheme , an air - filled , submerged in water spherical shell excited by a sound source located at the center of the sphere was calculated 为验证数学模型的正确性,对点声源激励下无界水域中充气球壳进行了数值计算。
Considering the point source requirement , the electric spark which can generate impulse - like signals is employed in this measurement and the near field hrtf data are obtained efficiently 为了满足近场情况下“点声源”的要求,本研究提出了电火花冲激点声源的测量方法,成功地获得了近场数据。
The new characteristics of borehole compensated ability of two transmitters and two receivers acoustic log system were given under a pulse resource and no attenuation ideal beds by numerical simulation 摘要通过数值模拟计算给出了点声源、无衰减各种理想地层条件下双发双收声系在不同扩径层段新的声速测井响应特征规律。
And then , the paper analyses the reason engaged in the directional property of underwater acoustic transducer and array , discusses the physical parameter of the directional property . to point acoustic source equal spacing linear array , the dissertation makes experiment analysis and simulation 分析了水声换能器及基阵指向特性形成的原因、表征指向特性的物理参数,并针对点声源等间距线列阵的指向性进行了数学、实验分析与方针。
In this paper the train running noise level has been predicted with the theory of point sound source . the sound exposure level of a train set pass , equivalent continuous sound level and maximum sound level of a train set pass has been taken as estimate values , and some kinds of affixation attenuation on the course of noise propagation is considered , then the corresponding visual software has been developed . these make it convenient and precise to predict the noise level 本文从点声源的理论出发,对列车运行噪声进行预测计算,采用一列车通过时的单发暴露声级、时间特性的最大声压级和一定时间内的等效声级等作为噪声评价量,并考虑了噪声传播过程中的各种附加衰减,编制了相应的可视化软件,使噪声预测计算方便、准确。