The articles in this volume present the state-of-the-art in noise prediction modeling and
measurement. The articles are partially based on class notes provided during the course `Noise
sources in turbulent shear flows' given at CISM on April 2011. The first part contains general
concepts of aero acoustics including vortex sound theory and acoustic analogies in the second
part particular emphasis is put into arguments of interest for engineers and relevant for
aircraft design: jet noise airfoil broadband noise boundary layer noise (including interior
noise and its control) and the concept of noise sources their theoretical modeling and
identification in turbulent lows. All these arguments are treated extensively with the
inclusion of many practical examples and references to engineering applications.
