Evaluation of Acoustic Noise Emission by Electric Motors of Bench Engines

S. Yannikakis, E. Dimitropoulou, F.G. Ioannidou, and M.G. Ioannides (Greece)


Acoustic noise, electric motors, spectral analysis


The sound level produced by the bench engines working in an educational dental technology laboratory was measured using an audio sound meter. The measurements were analyzed using a real-time spectrum analyzer and the spectrums of frequencies were identified. The results show that there is an influence of distance and configuration of installed apparatuses on the total level of the sound and on the content of identified harmonics. Also, the results obtained are compared to the acoustic noise limit values as imposed by the existent international standards and discussed.

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