Abstract
All industrial equipment in operation generates vibrations and noise and we perceive and interpret them. Noise is therefore associated psychologically with the objects that emit them. The techniques of vibratory signal processing and generated sounds have allowed refining their perceptive impact and relating it to the structures characteristics. Our work essentially consists in establishing a relationship, or even a correlation, between the perceived sounds and the resulting vibrations. For this, we have studied the influence of the sound pressure level on the ability of auditors to identify the evolution of the defect severity. Two perceptual tests were performed: The first is carried out on sounds obtained directly by the conversion of vibratory signals measured on the machine. Conversely, the second test is conducted on the same sounds by equalizing their sound pressure levels, where the idea is to let the listeners focus on the content of the sounds but not on their pressure levels. The obtained results allowed the establishment of correlations between the objective and subjective aspects and to highlight the important relationships that exist between the vibratory indicators and the distances between the sounds in the proximity space. The obtained correlation coefficient from the second test, which is higher than that of the first one, shows that the equalization procedure of the sound pressure levels has a much more indicative impact on the identification of the evolution of the defects severity.
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Younes, R., Ouelaa, N., Hamzaoui, N. et al. The Influence of the Sound Pressure Level on the Identification of the Defects Severity in Gear Transmission by the Sound Perception. Acoust Aust 47, 239–246 (2019). https://doi.org/10.1007/s40857-019-00165-2
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DOI: https://doi.org/10.1007/s40857-019-00165-2