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The sound of oscillating air jets: P...

Stanford University.

The sound of oscillating air jets: Physics, modeling and simulation in flute-like instruments.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The sound of oscillating air jets: Physics, modeling and simulation in flute-like instruments.
作者:	de la Cuadra, Patricio.
面頁冊數:	144 p.
附註:	Adviser: Chris Chafe.
附註:	Source: Dissertation Abstracts International, Volume: 66-11, Section: A, page: 3854.
Contained By:	Dissertation Abstracts International66-11A.
標題:	Music.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3197423
ISBN:	9780542431203

The sound of oscillating air jets: Physics, modeling and simulation in flute-like instruments.
de la Cuadra, Patricio.

The sound of oscillating air jets: Physics, modeling and simulation in flute-like instruments. - 144 p.

Adviser: Chris Chafe.

Thesis (Ph.D.)--Stanford University, 2006.

Flute-like instruments share a common mechanism that consists of blowing across one open end of a resonator to produce an air jet that is directed towards a sharp edge. Analysis of its operation involves various research fields including fluid dynamics, aero-acoustics, and physics. An effort has been made in this study to extend this description from instruments with fixed geometry like recorders and organ pipes to flutes played by the lips. An analysis of the jet's response to a periodic excitation is the focus of this study, as are the parameters under the player's control in forming the jet.

ISBN: 9780542431203Subjects--Topical Terms:

227185
Music.

The sound of oscillating air jets: Physics, modeling and simulation in flute-like instruments.
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502 $a Thesis (Ph.D.)--Stanford University, 2006.
520 # $a Flute-like instruments share a common mechanism that consists of blowing across one open end of a resonator to produce an air jet that is directed towards a sharp edge. Analysis of its operation involves various research fields including fluid dynamics, aero-acoustics, and physics. An effort has been made in this study to extend this description from instruments with fixed geometry like recorders and organ pipes to flutes played by the lips. An analysis of the jet's response to a periodic excitation is the focus of this study, as are the parameters under the player's control in forming the jet.
520 # $a The control exerted by the performer on the instrument is of crucial importance in the quality of the sound produced for a number of flute-like instruments. The case of the transverse flute is experimentally studied. An ensemble of control parameters are measured and visualized in order to describe some aspects of the subtle control attained by an experienced flautist. Contrasting data from a novice flautist are compared. As a result, typical values for several non-dimensional parameters that characterize the normal operation of the instrument have been measured, and data to feed simulations has been collected.
520 # $a The information obtained through experimentation is combined with research developed over the last decades to put together a time-domain simulation. The model proposed is one-dimensional and driven by a single physical input. All the variables in the model are expressed in terms of pressure which allows for implementation and control in real-time. The model provides both a testbed to compare and validate measurements as well as a highly configurable and real-time musical instrument.
520 # $a The jet is excited with a controlled excitation consisting of two loudspeakers in opposite phase. A Schlieren system is used to visualize the jet, and image detection algorithms are developed to extract quantitative information from the images. In order to study the behavior of jets observed in different flute-like instruments, several geometries of the excitation and jet shapes are studied. The obtained data is used to propose analytical models that correctly fit the observed measurements and can be used for simulations.
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