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Studies in Musical Acoustics and PsychoacousticsFeedback of Different Room Geometries on the Sound Generation and Sound Radiation of an Organ Pipe

Studies in Musical Acoustics and Psychoacoustics: Feedback of Different Room Geometries on the... [Feedback effects of different room geometries on the sound generation and sound radiation of an organ pipe is discussed. Motivation of the present work is that in real organs many of the organ pipes cannot radiate sound without disturbance. Most of the organ pipes are mounted, concealed from the audience’s view, behind the organ’s prospect. Organ pipes of the same stop and with nearly identical timbre are arranged closely on the wind-chest. With several pipe ranks, sound radiated is reflected from pipes as well as from structural elements such as beams or mounting brackets, which hinder free sound radiation. The investigations were carried out by numerical simulations of an organ pipe and its aeroacoustical interaction with several principally different wall geometries as well as swell chambers. The investigation focuses on the effects of reflected sound waves upon the sound generator region of the organ pipe. Several general set-ups were implemented in a numerical space, a pseudo-3D computational grid. The numerical simulations were calculated by solving the fully compressible Navier-Stokes equations with suitable initial and boundary conditions for different geometric constraints using a proper LES-model.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Studies in Musical Acoustics and PsychoacousticsFeedback of Different Room Geometries on the Sound Generation and Sound Radiation of an Organ Pipe

Part of the Current Research in Systematic Musicology Book Series (volume 4)
Editors: Schneider, Albrecht
Fischer, Jost Leonhardt
Studies in Musical Acoustics and Psychoacoustics — Dec 27, 2016
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33 pages

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Publisher
Springer International Publishing
Copyright
© Springer International Publishing AG 2017
ISBN
978-3-319-47291-1
Pages
109 –142
DOI
10.1007/978-3-319-47292-8_4
Publisher site
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Abstract

[Feedback effects of different room geometries on the sound generation and sound radiation of an organ pipe is discussed. Motivation of the present work is that in real organs many of the organ pipes cannot radiate sound without disturbance. Most of the organ pipes are mounted, concealed from the audience’s view, behind the organ’s prospect. Organ pipes of the same stop and with nearly identical timbre are arranged closely on the wind-chest. With several pipe ranks, sound radiated is reflected from pipes as well as from structural elements such as beams or mounting brackets, which hinder free sound radiation. The investigations were carried out by numerical simulations of an organ pipe and its aeroacoustical interaction with several principally different wall geometries as well as swell chambers. The investigation focuses on the effects of reflected sound waves upon the sound generator region of the organ pipe. Several general set-ups were implemented in a numerical space, a pseudo-3D computational grid. The numerical simulations were calculated by solving the fully compressible Navier-Stokes equations with suitable initial and boundary conditions for different geometric constraints using a proper LES-model.]

Published: Dec 27, 2016

Keywords: Phase Portrait; Sound Pressure; Sound Pressure Level; High Harmonic; Sound Generation

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