Application of parametric speakers to radio acoustic sounding system
Application of parametric speakers to radio acoustic sounding system
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DOI：
10.5194/amt-12-5699-2019
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发表时间：
2019-05
影响因子：
3.8
通讯作者：
A. Adachi;H. Hashiguchi
中科院分区：
文献类型：
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作者：
A. Adachi;H. Hashiguchi
抽象的。在这项研究中，使用带有无线电声学探测系统(RASS)的风廓线和业务无线电探空仪测量，以调查使用参数扬声器测量虚拟温度垂直分布的技术实用性和可靠性。参数扬声器的特性包括高方向性和很低的旁瓣，这是RAS的首选，特别是在城市地区运行的RAS。这些实验是在天气晴朗、有微风的情况下进行的，以减轻风的水平和垂直分量对用于RASS的声波的影响。研究结果表明，尽管参数扬声器由于声束较窄而容易受到水平风的影响，但参数扬声器对探空仪虚拟温差的偏差和标准差(0.1∘C，0.4∘C)接近于声学扬声器的偏差和标准差(0.0∘C，0.4∘C)。此外，与声学扬声器RASS相比，参数扬声器RASS的值更小(0.1∘C，0.2∘C)。基于这些结果，得出结论：尽管参数扬声器RASS具有很高的声音指向性，但它的准确度和精确度与声学扬声器RASS相当。
Abstract. In this study, a wind profiler with a radio acoustic sounding system (RASS) and operational radiosonde measurements were used to investigate the technical practicability and reliability of using parametric speakers to measure the vertical profile of virtual temperature. Characteristics of parametric speakers include high directivity and very low side lobes, which are preferable for RASS, especially those operating in urban areas. The experiments were conducted on fine days with light winds to mitigate the effects of the horizontal and vertical components of wind on acoustic waves used for RASS. The results of this study indicated that, although parametric speaker RASS is susceptible to horizontal winds due to the narrower acoustic beam, bias and standard deviation of parametric speaker RASS versus radiosonde virtual temperature difference (0.1 ∘C, 0.4 ∘C) were close to those from acoustic speakers (0.0 ∘C, 0.4 ∘C). In addition, when compared with acoustic speaker RASS, the values for the parametric speaker RASS were even smaller (0.1 ∘C, 0.2 ∘C). Based on these results, it is concluded that the parametric speaker RASS has accuracy and precision comparable with acoustic speaker RASS despite its high directivity of sound.