最后初步提出了有源声学结构次级源的设计准则。
According to the simulation results, the rules of the secondary sound source design have been introduced.
提出带孔盖板的自由液浸式环氧灌注的圆柱管形换能器声学结构模型。
This paper presents an acoustic structure model of free—flooded cylindrical transducer installed with holed end-caps.
结果表明，非鸣禽、亚鸣禽及鸣禽叫声的声学结构具有很大的差异性。
The results showed that the acoustic structures of non-passerine, sub-oscine passerine and oscine passerine's songs have significant differences.
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