Design for Transmission Noise Abatement (DETNA)

The high level of interior noise in helicopters for passenger transport is becomming an increasing problem for operators and manufacturers of helicopters. This interior noise is caused primarily by the audio-frequency vibration and noise from the main gearbox. Hence, with the objective of reducing the interior noise level significantly, the purpose of this proposed research is to develop a framework of novel theoretical prediction tools and testing guidelines for the new design and quality control of quiet gears and low vibration gearboxes.
In this coordinated research the Dept. of Acoustic Technology (AT) will contribute with an advanced source strength descriptor of the gearbox, based on results from the previously reported RHINO-project, and with novel quality control techniques. At this initial stage AT is being funded by STVF's START-programme.