Abstract

A sound production model of the flute-like instrument which allows the jet to deflect overall has been proposed recently. The overall deflection is introduced to satisfy flow consistency at the instrument's window (embouchure hole or mouth), i.e., the condition that the volume velocity swept by the oscillating jet should be equal to that through the window. The full oscillation of the jet is the sum of the deflection and the oscillation caused by fluid dynamical sinuous instability. This model can correctly reproduce the reflection function of a recorder's head as seen from the resonator. The next question is whether the model can predict the sound level of the flute-like instrument correctly. To answer the question, the model was first formulated in the time domain. In this formulation, measures were taken to prevent the oscillation from drifting. Using the time-domain model, physical modeling simulation of a recorder was performed to obtain sound levels produced for various blowing pressures. Artificial blowing experiments with a real instrument are in progress to compare the simulation results with the actual sound levels.

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