We report experimental speeds of sound in methanol. Measurements were conducted at temperatures from 233 to 353 K with pressures up to 20 MPa using the double-path length pulse-echo technique. The relative expanded combined uncertainty (k = 2) in measurement was estimated to vary from 0.012 to 0.014%, considering contributions from temperature, pressure, path length calibration, pulse timing, and purity of the sample. Experimental speeds of sound gained in the scope of this work were compared with the equation of state by de Reuck and Craven, as well as with further data from literature.

中文翻译：

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在233.33至353.21 K的温度下（最高压力为20 MPa）在甲醇中的声速

我们报告了甲醇中声音的实验速度。使用双路径长度脉冲回波技术在233至353 K的温度，最高20 MPa的压力下进行了测量。 考虑到温度，压力，路径长度校准，脉冲时间和样品纯度的影响，测量中的相对扩展组合不确定度（k = 2）估计在0.012％至0.014％之间变化。将在这项工作范围内获得的声音的实验速度与de Reuck和Craven提出的状态方程进行了比较，并与文献中的进一步数据进行了比较。