Manatee software news The work on the further development of Manatee software is going on with great steps. We are approaching the third major release of Manatee V2.2 which will
Acoustic noise sources in Hybrid Electric Vehicles or full Electric Vehicles (HEV/EV) must be controlled to guarantee an adequate level of acoustic comfort to both passers-by, drivers, and passengers. This
Electromagnetic forces can be a major source of unpleasant noise in electric machines. The presentation focuses on understanding how magnetic noise and vibration are generated by slotting harmonics and switching
The presentation first gave a theoretical background on e-NVH and its generation process focusing on switching noise. Then the presentation detailed the experimental test set-up using a SCIM washing machine
Definition Sound perception is a subjective phenomenon depending on both physical and cognitive factors. The aim of psychoacoustics is to better understand the human perception of sound and improve Sound
Definitions A tone is a sound composed of a single frequency component. Sounds we hear can be either pure tones (e.g. a whistle in a quiet background), or a combination
Context Hearing is a cognitive phenomenon : auditive perception can be improved with experience, but it can also diminish with age, hearing fatigue or traumatism. Perception varies from a person
Definition Some sounds may no longer be perceived when combined with an additional sound: this effect is called masking. There are two forms of masking : spectral and temporal. Spectral
Authors M. Glesser, K. Degrendele, J. Le Besnerais Status Accepted in Journée Techniques Acoustique et Vibrations, CEREMA Date 2020 Keywords Psychoacoustics, electric powertrain, sound quality, simulation software Abstract Several physical
Definition PWM (Pulse-Width Modulation) is a technique initially developed to control electrical machines at variable speed. It is based on the generation of voltage pulses of variable width: when smoothed