The Experts below are selected from a list of 5622 Experts worldwide ranked by ideXlab platform
Francois Ollivier - One of the best experts on this subject based on the ideXlab platform.
-
modal proportional and derivative state active control applied to a simplified String Instrument
Journal of Vibration and Control, 2016Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamoumani, Francois OllivierAbstract:This study proposes an application of modal active control to musical String Instruments. Its aim is to control the modal parameters of the soundboard in order to modify the sound of the Instrument. Using both state and derivative state modal control, a method is given, from the modeling of the active structure through to the design of the control system. Issues such as the identification of the structure’s characteristics or the stability of the control system are dealt with for this original control method. Then, this technique is applied to a model of a simplified String Instrument soundboard. Time simulations are conducted to study its effect on the Instrument vibration. They show that, thanks to soundboard modal active control, it is possible to modify the amplitude of the sound harmonics to change the timbre as well as the sound level of the Instrument.
Simon Benacchio - One of the best experts on this subject based on the ideXlab platform.
-
modal proportional and derivative state active control applied to a simplified String Instrument
Journal of Vibration and Control, 2016Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamoumani, Francois OllivierAbstract:This study proposes an application of modal active control to musical String Instruments. Its aim is to control the modal parameters of the soundboard in order to modify the sound of the Instrument. Using both state and derivative state modal control, a method is given, from the modeling of the active structure through to the design of the control system. Issues such as the identification of the structure’s characteristics or the stability of the control system are dealt with for this original control method. Then, this technique is applied to a model of a simplified String Instrument soundboard. Time simulations are conducted to study its effect on the Instrument vibration. They show that, thanks to soundboard modal active control, it is possible to modify the amplitude of the sound harmonics to change the timbre as well as the sound level of the Instrument.
-
Mode tuning of a simplified String Instrument using time-dimensionless state-derivative control
Journal of Sound and Vibration, 2015Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamou-mani, Victor FinelAbstract:In recent years, there has been a growing interest in smart structures, particularly in the field of musical acoustics. Control methods, initially developed to reduce vibration and damage, can be a good way to shift modal parameters of a structure in order to modify its dynamic response. This study focuses on smart musical Instruments and aims to modify their radiated sound. This is achieved by controlling the modal parameters of the soundboard of a simplified String Instrument. A method combining a pole placement algorithm and a time-dimensionless state-derivative control is used and quickly compared to a usual state control method. Then the effect of the mode tuning on the coupling between the String and the soundboard is experimentally studied. Controlling two vibration modes of the soundboard, its acoustic response and the damping of the third partial of the sound are modified. Finally these effects are listened in the radiated sound.
Adrien Mamoumani - One of the best experts on this subject based on the ideXlab platform.
-
modal proportional and derivative state active control applied to a simplified String Instrument
Journal of Vibration and Control, 2016Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamoumani, Francois OllivierAbstract:This study proposes an application of modal active control to musical String Instruments. Its aim is to control the modal parameters of the soundboard in order to modify the sound of the Instrument. Using both state and derivative state modal control, a method is given, from the modeling of the active structure through to the design of the control system. Issues such as the identification of the structure’s characteristics or the stability of the control system are dealt with for this original control method. Then, this technique is applied to a model of a simplified String Instrument soundboard. Time simulations are conducted to study its effect on the Instrument vibration. They show that, thanks to soundboard modal active control, it is possible to modify the amplitude of the sound harmonics to change the timbre as well as the sound level of the Instrument.
Julius O Smith - One of the best experts on this subject based on the ideXlab platform.
-
joint modeling of bridge admittance and body radiativity for efficient synthesis of String Instrument sound by digital waveguides
IEEE Transactions on Audio Speech and Language Processing, 2017Co-Authors: Esteban Maestre, Gary P Scavone, Julius O SmithAbstract:In the context of efficient sound synthesis by digital waveguides, we present a novel methodology for joint modeling of String Instrument body radiativity and driving-point bridge admittance functions, as obtained from experimental data. From our modeling framework, aimed at simulation of guitar and bowed String sound, here we focus on the body of the Instrument and leave aside the Strings. First, a modal decomposition of the measured bridge admittance is obtained by means of a novel frequency-domain algorithm for optimization of recursive digital filters in parallel form. Then, from extracted modal parameters, the radiativity, and admittance functions are modeled by projecting measurements over a common modal basis, enforcing passivity of the two-dimensional admittance model by means of semidefinite programming. We propose a formulation that enables the joint realization of bridge reflectance and sound radiativity as a lumped delay line termination in which a single bank of resonant filters is shared among all String reflection and body radiation outputs. Our approach provides efficient means to model two-dimensional (2-D) bridge reflectance, 2-D String–String coupling, sound radiation with an arbitrary number of outputs, and (implicitly) vibrational energy loss from the bridge transmittance to nonradiating modes and dissipation.
-
digital modeling of String Instrument bridge reflectance and body radiativity for sound synthesis by digital waveguides
Workshop on Applications of Signal Processing to Audio and Acoustics, 2015Co-Authors: Esteban Maestre, Gary P Scavone, Julius O SmithAbstract:This paper proposes a method for modeling bridge reflectances and body radiativity profiles as digital filters in the context of sound synthesis by digital waveguides. The model is based on modal analysis of bridge driving-point admittance measurements obtained experimentally. Digital filter coefficients are estimated from modal analysis parameters, which are obtained by an optimization process that minimizes the error between measured and synthesized admittances, and between measured and synthesized radiativity profiles. Filter coefficients are then used in a digital waveguide synthesis model to render plucked String sounds.
Baptiste Chomette - One of the best experts on this subject based on the ideXlab platform.
-
modal proportional and derivative state active control applied to a simplified String Instrument
Journal of Vibration and Control, 2016Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamoumani, Francois OllivierAbstract:This study proposes an application of modal active control to musical String Instruments. Its aim is to control the modal parameters of the soundboard in order to modify the sound of the Instrument. Using both state and derivative state modal control, a method is given, from the modeling of the active structure through to the design of the control system. Issues such as the identification of the structure’s characteristics or the stability of the control system are dealt with for this original control method. Then, this technique is applied to a model of a simplified String Instrument soundboard. Time simulations are conducted to study its effect on the Instrument vibration. They show that, thanks to soundboard modal active control, it is possible to modify the amplitude of the sound harmonics to change the timbre as well as the sound level of the Instrument.
-
Mode tuning of a simplified String Instrument using time-dimensionless state-derivative control
Journal of Sound and Vibration, 2015Co-Authors: Simon Benacchio, Baptiste Chomette, Adrien Mamou-mani, Victor FinelAbstract:In recent years, there has been a growing interest in smart structures, particularly in the field of musical acoustics. Control methods, initially developed to reduce vibration and damage, can be a good way to shift modal parameters of a structure in order to modify its dynamic response. This study focuses on smart musical Instruments and aims to modify their radiated sound. This is achieved by controlling the modal parameters of the soundboard of a simplified String Instrument. A method combining a pole placement algorithm and a time-dimensionless state-derivative control is used and quickly compared to a usual state control method. Then the effect of the mode tuning on the coupling between the String and the soundboard is experimentally studied. Controlling two vibration modes of the soundboard, its acoustic response and the damping of the third partial of the sound are modified. Finally these effects are listened in the radiated sound.
