文献类型：期刊文献

英文题名：Synthesizing the frequency-dependent sound relaxational absorption by three-frequency sound speeds in excitable gases

作者：Zhang, Kesheng Ding, Yi Zhang, Xiangqun Hu, Yi

第一作者：张克生

通信作者：Zhang, XQ[1]

机构：[1]Guizhou Inst Technol, Sch Artificial Intelligence & Elect Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Wuyi Univ, Fac Intelligent Mfg, Jiangmen 529020, Peoples R China;[3]Xuchang Univ, Sch Informat Engn, Xuchang 461000, Henan, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Xuchang Univ, Sch Informat Engn, Xuchang 461000, Henan, Peoples R China.

年份：2022

卷号：188

外文期刊名：APPLIED ACOUSTICS

收录：;EI(收录号：20215211376154);Scopus(收录号：2-s2.0-85121548068);WOS:【SCI-EXPANDED(收录号:WOS:000776179000006)】；

基金：The authors would like to thank the anonymous reviewers for their constructive and insightful comments for further improving the quality of this work. This work is supported by the National Natural Science Foundation of China (Grant Nos. 62071189, 61461008, 61701354), the National Science Foundation of Guizhou Province of China (Grant Nos. Qian Ke He Ji Chu-ZK[2021] Yi Ban 318, Qian Ke He J Zi [2015]2065), Key Technologies R&D Program of He'nan Province of China (Grant No. 212102310906, 212102210084), the Recruitment Program of Guizhou Institute of Technology (Grant No. XJGC20140601), and the Scientific Research Innovation Team of Xuchang University (Grant No. 2022CXTD004).

语种：英文

外文关键词：Sound relaxational absorption; Sound speed dispersion; Coefficient of compressibility; Gas detection

摘要：Capturing the frequency-dependent sound relaxational absorption in excitable gases has the potential of wide applications in gas detection; however, it is still challenging to accurately measure it in real time. With the aid of the relationship between effective compression coefficient and acoustic relaxation process, an approach to synthesize the frequency-dependent sound relaxational absorption is proposed by using the sound speeds at three frequencies under a single pressure that are far easier to be precisely measured in real time. The proposed approach includes three steps. Firstly, the relaxation strength is calculated from the low-frequency and the high-frequency sound speeds measured at two selected frequencies; secondly, the adiabatic constant pressure relaxation time is calculated from the sound speed measured at the third frequency within the range where the sound relaxational absorption is significant; finally, the frequency-dependent sound relaxational absorption and sound speed dispersion are synthesized by the real and imaginary parts of the normalized high-frequency effective adiabatic coefficient. For gases containing CH4, CO2, CL2 and N-2, the synthesized results are consistent with the experimental data. Our approach provides a real-time acoustic solution with higher accuracy and implementation convenience for gas detecting. (c) 2021 Elsevier Ltd. All rights reserved.