Abstract
We present ongoing work on the development of an aeroacoustic model of blown-closed free reeds used in a hand harmonium. Physics-based models of free reed instruments involve modeling of the oscillating free reed, the air-flow in the upstream region and around the reed, and the interaction between these two systems. The minimal model of free reeds by Millot and Baumann (2007) assumed the reed as a damped spring-mass system and approximated the air flow field by two discrete zones representing the flow near the reed and the upstream region respectively. Our recent work included the adaptation of the minimal model to match the physical setup and control parameters of the hand harmonium and the development of a distributed clamped-bar model of the free reed. These updates resulted in a closer agreement of the parameters for simulation and the observed physical variables. To address limitations of this model, we present a revised modeling of the air flow as a continuous potential flow and discuss implications for numerical stability, accuracy and real-time sound synthesis.
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