The Gear Whine Noise and vibro-acoustic …（齿轮抱怨噪音和纵u2026）.pdf

Recent Researches in Multimedia Systems, Signal Processing, Robotics, Control and Manufacturing Technology The Gear Whine Noise and vibro-acoustic emission of gear-box Niola V., Quaremba G. Department of Mechanical and Energetics University of Naples “Federico II” Via Claudio 21, 80125, Napoli, ITALY vincenzo.niola@unina.it http://niola.dime.unina.it/ Abstract – This article reports the results of several tests, carried out in optical gear whine noise to evaluate the difference between the vibro-acoustic emission of two gearboxes of the same type, one, in particular, showing a micro-geometrical error located on the side of tooth and characterized by lack of material at the base of the tooth due to a slight drift of the production process. The tests were carried out in fourth gear. The user of the vehicle, in fact, seems to be particularly attentive to the vibro-acoustic emissions. For that reason the major car manufacturers devote significant resources to the Noise, Vibration and Harshness sector, which deals with noise and vibration of the vehicle to the vehicle driving comfort. Key-Words: - vibro-acoustic emission, gearbox, gear whine noise, signal processing, automotive, driving comfort. 1 Introduction Usually, the acoustic noise occurs at meshing Continuing advances in the automotive frequency ranging between 50 and 90 dB (A). industry in recent years, leading manufacturers of automobiles to develop more and more Because the acoustic pressure, due to GWN, is advanced products from technical and quality not necessarily proportional to the engine speed point of view.