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Transfer function measurements of the Bassoon

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Day / Time: 17.08.2021, 12:00-12:40
Download: 600.pdf
Typ: Poster
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Abstract: Physical models of the reed wind instruments allow to simulate the evolution of self-sustained oscillations of the reed and the resulting mouthpiece pressure. However, the sound inside the mouthpiece is quite different in timbre from the radiated sound.The goal of this study is to investigate the timbre change of the sound as pressure waves travel from the reed into the room.An approach is shown which bases on the assumption, that the non-linear generation of pipe oscillations can be treated independently from the linear and time invariant transmission of sound from within the bore into the room. Then, an output-to-output transfer function (from the mouthpiece to the room microphone) can be estimated during measurements. If the sound pressure inside the reed mouthpiece is known (e.g. from a measurement or simulation), the sound pressure at a listening position in a room can be approximated by means of convolution.This contribution presents a measurement setup and postprocessing for the case of the bassoon, and the current work in progress focussing on sound quality of the syntheses.Further work should be done to test measured 3D source-receiver transferfunctions for rendering of musical instrument sounds in virtual acoustic scenes.