Investigating noise sources for a heavy vehicle

Although the problem of NVH is a well-known topic and studied by researchers, the persistence of noise of different frequencies, in the range of 16-16kHz, in the environment, in this case in heavy-duty vehicles, remains a topic of interest that must be adapted to new technical innovations. Major vehicle manufacturers are investing exhaustible resources of time and money to improve the vibro-acoustic performance of vehicles, which have evolved from simplistic mechanisms to complex systems with multiple functions. In a complex dynamic system, such as the cab of a truck, a number of variables come into play in the interior noise problem. This paper presents a starting point in combating noise inside and outside heavy-duty vehicles, by presenting the main sources of noise, in order to obtain an initial picture of the cumulative impact due to noise and vibration generated by acoustic sources from vehicle operation.