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Vibroacoustic analysis of mechanical systems has an important role in the engineering discipline. This can be used as a monitoring tool to obtain insights about the condition of a system, identify its probable defects, and determine the time window that the maintenance should happen. This article introduces the basics of signal processing in time, frequency, and time-frequency domains. It focuses on statistical analysis of the time-domain data. Various measures of data distribution and variability are pointed out. Important signal-processing functions in the frequency domain are presented and explained with examples. The article discusses and clarifies the benefits of time-frequency domain based on short-time Fourier transform with some practical applications. The article presents the most frequently used statistical functions. It concludes with information on some real-world applications of vibroacoustic analysis.

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M. Hosseini Fouladi, S. Narayana Namasivayam, M. Ghassem, M.J. Mohd Nor, Vibroacoustic Monitoring Using Signal-Processing Techniques, Friction, Lubrication, and Wear Technology, Vol 18, ASM Handbook, Edited By George E. Totten, ASM International, 2017, p 1032–1039,

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