Low-frequency noise and vibration: biomedical aspects of influence on human and technical solutions for it removal

This paper goal is to show an analogy between technogenic and endogenic low-frequency noise and vibration (LFNV) impact on human heart and to analyze heart biomechanics and hemodynamics in both of normal and pathological states. We suppose that low-frequency pressure oscillations obtained in both of normal and damaged heart may have more dramatic influence on ischemical foci and lead to additional cardiac muscle damage according to mechanism of LFNV negative influence. Also we represent a technical solution for LFNV elimination developed for modern aircraft engines of high by-pass ratio. For this device a mathematical model was created and experimental research was carried out. New mounting supply a 12-14 dB noise decreasing in frequency range from 6 to 80 Hz. This result have a good agreement with theoretical calculations.