Longhini C, Portaluppi F, Arslan E, Pedrielli F, Ravenna F, Toselli T
G Ital Cardiol. 1979;9(3):329-30.
The frequency spectrum analysis (Fourier's analysis) has recently been applied to phonocardiography. Using this mathematical approach instead of the current empirical analysis, it is possible to obtain -- on a less subjective basis -- more precise pathophysiological and diagnostic information from the acoustic cardiac phenomena. On the other hand, this refinement of the method of analysis stresses the need for better technical and methodological solutions, in order to reach the standardization of both the transduction and the recording of the acoustic signal at higher level of sensibility, fidelity and reproducibility. With this in mind, and on the basis of their experience, the Authors suggest the adoption of devices with specific technical characteristics, and propose a suitable method of application of Fourier's analysis to the phonocardiogram.
频谱分析（傅里叶分析）最近已应用于心音图检查。采用这种数学方法而非当前的经验分析方法，可以在较少主观因素的基础上，从心脏声学现象中获得更精确的病理生理和诊断信息。另一方面，这种分析方法的改进强调了需要更好的技术和方法解决方案，以便在更高的灵敏度、保真度和可重复性水平上实现声学信号转导和记录的标准化。考虑到这一点，并基于他们的经验，作者建议采用具有特定技术特性的设备，并提出一种将傅里叶分析应用于心音图的合适方法。
