Flutelike instruments: A perfect joint between acoustics and hydrodynamics
Benoı̂t Fabre · The Journal of the Acoustical Society of America · 2007
The oscillation in flutelike instruments results from the aeroacoustic coupling of an hydrodynamic mode of a jet with an acoustic mode of a resonator. Since musical instruments are empirically optimized oscillators, the modeling of flutes appears as a test bench for different approaches. Complementary descriptions have been developed in the literature from the point of view of acoustics or from the point of view of hydrodynamics. Unfortunately, the basic hypothesis in both fields are not easily compatible: for instance, as a first approximation, pipe acoustics can be studied neglecting the influence of mean flow, while the jet instability can be studied neglecting the influence of compressibility. In the presentation, we will develop an aero-acoustic approach to the oscillation in flutelike instruments, that focuses on the different approximations that need to be carried. We will emphasize on the limited range of control parameters that the current models may describe. The different elements will be discussed as well as the traditional custom to study the system as a lumped model.