TY - GEN
T1 - Numerical computations of a recorder fluid
AU - Fub, Stefanie
AU - Marburg, Steffen
PY - 2010
Y1 - 2010
N2 - In this talk the numerical simulation of the sound spectrum and the propagation of the acoustic noise inside and around a three-dimensional recorder model is presented. The fluid inside and close to the recorder is meshed by Lagrangian tetrahedral finite elements. Complex conjugated Astley-Leis infinite elements are used to obtain results in the far field of the recorder. When playing a recorder, the air column inside the instrument starts to oscillate due to the inserted air flow. The musician is able to influence the frequency of a note by varying the blowing pressure and therewith a fine-tuning of the sound is possible. The sound propagation in fluids with a non-uniform flow can be described by the Galbrun equation. We present the influence of the flow on the eigenfrequencies. Furthermore, it is possible to represent the excitation mechanism for a sound propagation inside and around the recorder with quadrupole sources, which occur in the surroundings of the labium. The numerical results are compared to measurements on the recorder. Copyright
AB - In this talk the numerical simulation of the sound spectrum and the propagation of the acoustic noise inside and around a three-dimensional recorder model is presented. The fluid inside and close to the recorder is meshed by Lagrangian tetrahedral finite elements. Complex conjugated Astley-Leis infinite elements are used to obtain results in the far field of the recorder. When playing a recorder, the air column inside the instrument starts to oscillate due to the inserted air flow. The musician is able to influence the frequency of a note by varying the blowing pressure and therewith a fine-tuning of the sound is possible. The sound propagation in fluids with a non-uniform flow can be described by the Galbrun equation. We present the influence of the flow on the eigenfrequencies. Furthermore, it is possible to represent the excitation mechanism for a sound propagation inside and around the recorder with quadrupole sources, which occur in the surroundings of the labium. The numerical results are compared to measurements on the recorder. Copyright
UR - http://www.scopus.com/inward/record.url?scp=84869107008&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84869107008
SN - 9781617827457
T3 - 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
SP - 1410
EP - 1412
BT - 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
T2 - 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
Y2 - 23 August 2010 through 27 August 2010
ER -