Search

Your search keyword '"Lionel Velut"' showing total 4 results
Start Over Author "Lionel Velut" Search Limiters Full Text
4 results on '"Lionel Velut"'

1. Physical modelling of trombone mutes, the pedal note issue

Author

Christophe Vergez, Lionel Velut, Joël Gilbert, Sons, Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), MESR, Labex MEC (ANR-10-LABX-0092), Initiative d'Excellence A*MIDEX (ANR-11-IDEX-0001-02), ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), VELUT, Lionel, INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE - - Amidex2011 - ANR-11-IDEX-0001 - IDEX - VALID, Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], Range (music), Engineering, [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Acoustics and Ultrasonics, business.industry, Acoustics, [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS], [MATH.MATH-DS] Mathematics [math]/Dynamical Systems [math.DS], [PHYS.PHYS.PHYS-FLU-DYN] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], Physical modelling, Active control, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Linear stability analysis, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Intonation (music), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], business, [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Music, Simulation
Abstract

International audience; Brass players use a variety of mutes to change the sound of their instrument for artistic expression. However, mutes can also modify the intonation and the playability of the muted instrument. An example is the use of a straight mute on a trombone, which makes it very difficult to play stable pedal notes.Previous studies have shown that using a straight mute establishes a parasitic acoustic resonance in the trombone. To cancel this modification, an active control device was developed and integrated into a mute, with satisfying experimental results [Meurisse et al., 2015]. With this device, the perturbed pedal notes can easily be played again.This paper investigates the ability of a physical model of brass instrument to reproduce the behaviour of the trombone pedal Bb without mute, or with an "active" or a "passive" straight mute. Linear stability analysis and time-domain simulations are used to analyse the behaviour of the model in the parameter range corresponding to the pedal note. Numerical results are compared for different models of instruments: a trombone, a trombone with a straight (passive) mute, an a trombone with an active mute. It is shown that the simple physical model considered behaves similarly to what is experienced with real instruments: the playing of the pedal note is perturbed with a passive mute, whereas the model of trombone with the experimental active mute gives results very similar to those obtained with an open trombone.

Published
2017

2. How well can linear stability analysis predict the behavior of an outward valve brass instrument model ?

Author

Christophe Vergez, Joël Gilbert, Mithra Djahanbani, Lionel Velut, Sons, Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Labex MEX (ANR-10-LABX-0092), A*MIDEX (ANR-11-IDEX-0001-02), Ministère de l'Enseignement Supérieur et de la Recherche, ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM)

Subjects
Engineering, Acoustics and Ultrasonics, linear stability analysis, PACS 43.75.Fg, time-domain simulation, [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS], physical model, 01 natural sciences, Instability, Brass, 03 medical and health sciences, 0302 clinical medicine, Linear stability analysis, 0103 physical sciences, 030223 otorhinolaryngology, Representation (mathematics), 010301 acoustics, Simulation, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], business.industry, Oscillation, Computer Science::Information Retrieval, brass instrument, Mechanics, Acoustics, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Nonlinear system, pedal note, Modal, Nonlinear model, visual_art, visual_art.visual_art_medium, business, Music
Abstract

International audience; A physical model of brass instrument is considered in this paper : a one degree-of-freedom outward-striking valve for the lips, non-linearly coupled to a modal representation of the air column. It is studied through Linear Stability Analysis (LSA) of the equilibrium solution. This approach provides the threshold blowing pressure value, at which instability occurs, and the instability frequency value. The relevance of the results of this method is theoretically limited to the neighbourhood of the equilibrium solution. This paper checks the efficiency of LSA to understand the behaviour of the model computed through time-domain simulations. As expected, a good agreement is observed between LSA and numerical simulations of the complete nonlinear model around the oscillation threshold. For blowing pressures far above the oscillation threshold, the picture is more contrasted. In most of the cases tested, a periodic regime coherent with the LSA results is observed, but over-blowing, quasi-periodicity and period-doubling also occur. Interestingly, LSA predicts the production of the pedal note by a trombone, for which only nonlinear hypotheses have been previously proposed. LSA also predicts the production of a saxhorn note which, although known to musicians, has barely been documented.

Published
2017
Full Text
View/download PDF

3. Effets d'une sourdine sur le seuil et la fréquence d'oscillation du premier régime du trombone

Author

Lionel Velut, Christophe Vergez, Joël Gilbert, Adrien Mamou-Mani, Thibaut Meurisse, Sons, Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), Equipe Acoustique instrumentale, Sciences et Technologies de la Musique et du Son (STMS), Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and VELUT, Lionel

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS], [MATH.MATH-DS] Mathematics [math]/Dynamical Systems [math.DS], [PHYS.PHYS.PHYS-FLU-DYN] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

L’usage de sourdines est courant pour modifier le timbre des instruments de la famille des cuivres. Cependant, ces sourdines peuvent également modifier la jouabilité de l’instrument. Ainsi, il devient plus difficile de jouer certaines notes pédales d’un trombone équipé d’une sourdine sèche,voire impossible à la nuance pianissimo.Des mesures précédentes ont montré que l’utilisation d’une sourdine sèche provoque principalement l’apparition d’un mode de résonance supplémentaire dans l’instrument, qui se traduit par un pic d’impédance d’entrée supplémentaire, de faible amplitude, entre le premier et le secondpic. Un dispositif de contrôle actif, ajouté à une sourdine sèche permet de supprimer ce pic d’impédance parasite sans modifier le timbre de l’instrument. De plus l’expérience a montré qu’un trombone équipé de cette sourdine permet aux trombonistes de jouer le Sib pédale sansdifficulté particulière.Ce travail propose une analyse de la dégradation de la jouabilité du Sib pédale par un trombone équipé de sourdines sèches passive et active. L’approche consiste à réaliser une analyse de stabilité linéaire de la solution non oscillante d’un modèle de trombone. Le modèle retenu couple une valve en dehors à un degré de liberté au résonateur de l’instrument représenté par la décomposition modale de son impédance d’entrée. Il est ainsi possible de réaliser l’analyse de stabilité du trombone avec sourdine sèche, avec sourdine active « allumée » ou « éteinte », et d’évaluer la pertinence du modèle physique utilisé pour interpréter les résultats expérimentaux décrits par les publications antérieures.

Published
2016

4. Simulations numériques de notes pédales pour des instruments de la famille des cuivres

Author

Lionel Velut, Christophe Vergez, Joel Gilbert, Fabrice Silva, Sons, Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Laboratoire d'Acoustique de l'Université du Mans (LAUM), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS), GIPSA - Group aeroacoustics, modeling and application (GIPSA-GAMA), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), and VELUT, Lionel

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Modal expansion, Musical instrument, Pedal note, Moreesc, [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS], [MATH.MATH-DS] Mathematics [math]/Dynamical Systems [math.DS], Trombone, [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Numerical Simulations, Saxhorn, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

International audience; Conical brass instruments, such as saxhorns, show an input impedance with almost harmonically distributed peaks, which allows to play notes whose frequencies approach a harmonic series. Conversely, all brass instruments with a long cylindrical section (notably trumpet and trombone) have their first impedance peak heavily shifted towards low frequencies (38 Hz for a trombone instead of 62 Hz if the first resonance frequency was belonging to the harmonic series formed by the upper peaks). However, trombonists can play the so-called "pedal note" despite its frequency close to 62 Hz, around a minimum of the input impedance. Previous publication showed interesting numerical and experimental results when using alternatively a saxophone reed and a brass mouthpiece on both a trombone and a saxhorn. In this paper, we try to reproduce numerically and extend the simulations results with a mouthpiece using Moreesc, a numerical tool based on the modal decomposition of the bore which allows changing parameters during the simulation. By simulating brass mouthpiece coupled with modal fits of measured trombone and saxhorn impedances, we examine this mysterious regime of oscillation. This allows to check the robustness of this phenomenon regardless of the numerical method. The influence of the number of modes taken into account is particularly investigated.

Catalog

Books, media, physical & digital resources
See catalog results