Community Research and Development Information Service - CORDIS


This document covers several aspects of advances in acoustics technology.

A broad cooperative study of active noise control in aircraft interiors has been performed. The main tasks and goals of the programme are described and important results presented here. In particular, information on feasible optimum active noise control systems for future practical applications were identified and demonstrated successfully during flight testing. Detailed baseline information for further improving this technology was established. A smaller programme related to rotary wing aircraft. It included the design, manufacture and testing of a model helicopter fuselage, as well as assessments of prediction codes and comparison with experimental results. Acoustic fatigue and related damage tolerance of advanced composite and metallic structures was addressed. The following three main areas have been investigated by means of experimental and theoretical tasks:
dynamic loads applied to structures through acoustic excitation;
structural dynamic responses;
acoustic fatigue strength data.
Eight partners investigated the noise radiation of helicopter rotors, including the aerodynamic sources. The dual objectives of the task were to improve rotor noise prediction, and to acquire a deeper understanding of rotor noise phenomena. mena.

Additional information

Authors: HERNANDEZ J M M (EDITOR), CEC Bruxelles (BE)
Bibliographic Reference: EUR 15495 EN (1994) FS
Availability: Available from John Wiley & Sons Ltd, Baffins Lane, Chichester PO19 1UD (GB)
ISBN: ISBN 0471-95149-8
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