This article is unavailable. Kirby, R., Cummings, A.. Structural/acoustic interaction in air-conditioning ducts in the presence of mean flow. Proceedings of ISMA23, International Conference on Noise and Vibration Engineering. Katholieke Universiteit Leuven, Belgium, 16-18 September 1998. vol. 2, pp.677 -684. If you wish to obtain a copy please contact the author below: ray.kirby@brunel.ac.uk