Phase synchronization implies that the rotors are synchronized to the same rotation speed
and different phases to minimize rotor noise in specific directions. In this study, the influence …

The annoying noise produced by the rotors of multi-rotor aircraft can bring severe
disturbance to the residents. Hence, it is essential to reduce the noise level of multi-rotor …

Propeller installation options for a twin-engined turboprop aircraft are evaluated at cruise
conditions, aiming to identify the quieter configuration. Computational fluid dynamics is used …

A comprehensive aeroacoustics study was conducted on distributed electric propulsion
(DEP) systems, focusing on small-scale, novel aircraft within the Urban Air Mobility (UAM) …

In order to suppress the near field aeroacoustics radiation on the fuselage wall of the tilt-
rotor aircraft, a noise suppression method is proposed based on the rotor phase control …

Viele ältere Physiker und Ingenieure kennen das Buch „Schwingungslehre “von Erwin
Meyer und mir, das 1974 beim Vieweg-Verlag erschienen ist (ISBN 3-528-08254-2) …

A hardware in the loop experimental platform is established to evaluate the optimal noise
reduction prediction and maintenance capability of multiple propellers under high-precision …

Several higher-order statistical metrics are used to evaluate the significance of waveform
nonlinearities in the sound field of a laboratory-scale coaxial, corotating rotor in hover …

Propeller synchrophasing is an effective way of reducing interior noise and vibration of
turboprop-driven aircraft. However, synchrophasing has achieved limited success in practice …

Vibration isolation of a floating raft system typically found in a marine application is of
concern in this paper. Housed on the raft are electrical motors each driving two counter …