Vibration and Structural Acoustics Analysis: Current Research and Related Technologies

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Concerned with the application of science and technology to the field of music. Of particular current interest are the following topics:. To increase and diffuse knowledge of noise generation and propagation, passive and active noise control, perception and the effects of noise, and the management of exposure to noise. Activities embrace the practical and theoretical aspects of noise in all areas of acoustics.

Specific topics of interest include:. Concerned with fundamental acoustic wave phenomena from infrasonic to ultrasonic frequencies. Theoretical, computational, and experimental approaches are used. Topics being investigated include:. Areas of interest include, but are not limited to:.

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Signal processing is the acquisition and generation of signals and the extraction of information from signals. It is an important tool in all areas of acoustics.

Annual Reports - Acoustical Society of America

Using signal processing algorithms, acousticians are able to extract signals from noise, to compress information for more efficient storage or transmission, to perform active noise cancellation, etc. The continuing technological advances in high-speed processing and memory will open more avenues of investigation in acoustics.

Concerned with the study of the production, transmission, and perception of speech, including the following:. Structural Acoustics is the study of the interaction of vibrating structures with adjacent fluid along with the accompanying radiated or scattered sound.

Structural Vibrations is the study of the linear and nonlinear vibration of structural components and waves in solid media. Applications of research outlined in the technical areas of SAV are found in a number of compelling and important applications that affect our health, safety, as well as the effectiveness of the products we engineer.

Topics of interest include:. The Science of Sound Acoustics is the science of sound and vibration. This structured sessions will address various aspects of this topic such as -Spatialized sound field rendering, in-motion user-centric auralization, optimized signal processing for real-time rendering, methods to better estimate and render room impulse responses -Room acoustics criteria reproduction including space , insulation and absorption material auralization, impact noise auralization -Improvements of relevant reproduction systems headphone based or multi-loudspeaker based reproduction systems -Psychoacoustic studies results, perceptual limitations and realism criteria for interior and exterior soundscape auralization -Experience-based immersive strategies including specific recording techniques, physical or non-physical modeling synthesis, intermodal environment restitutions.

This session includes basic and applied research on the topic of sound and its role in urban spaces. We invite papers on the evaluation and characterization of the public and private realms, on laboratory studies of urban sound perception, on the opportunities for soundscape planning and design in urban contexts, as well as on the mobilization of soundscape research knowledge into practice.

Action plans in urban area are issued by END every five years in Europe. Experiences from the last third round will be presented by contributed and invited speakers, regarding different solutions adopted: traffic flow managment, speed redution, low emission zones, low noise pavements, electric vehicles, integrated actions, green barriers, urban planning, etc. The understanding of the interaction between an acoustic wave and a complex medium is an important problem in various applications such as nondestructive testing NDT or biomedical ultrasound.

This session will focus on experimental issues including the development of inversion procedures. Nonlinear acoustics and vibration has become increasingly important during the last forty years due to the exponential increase of computation power, increasingly higher sensitivity of electronic instrumentation and suitable signal processing.

It is a broad field, which encompasses large amplitude sound waves and vibration. The nonlinearity of materials results in nonlinear effects, which arise from defects in the materials present at all scales. Applications include nonlinear nondestructive testing NDT , harmonic medical ultrasound imaging, high intensity focused ultrasound for noninvasive surgery, cavitation, and control of high intensity jet noise and development of new materials such as nanocomposite and memory based materials.

Also included are the phenomenon of chaos, which has become popular during the last twenty years with the establishment of institutes of nonlinear science and complex systems in universities and research centres. In addition, journals are now dedicated to this subject. Chaos theory is used today even in the prediction of price movement on stock markets.

Also an important topic for this session will be the application of gauge invariance approach to nonlinear acoustics and vibration which will include treatment of inverse scattering and multiple scattering problems and interactions. We have witnessed the growth in this field demonstrated by the increasing number of papers to the current number of twenty to thirty papers presented at each ICSV congress.

Acoustic cloaking is the first application of sound propagation in curvilinear spacetime. Curvilinear spacetime approach is especially suitable for intense sound and nonlinear acoustics due to the curvilinear path of intense sound field. By developing nonlinear acoustics on the curvilinear spacetime, one will increase the sensitivities, accuracies and completeness of the subject.

Also curvilinear spacetime will enable the covariance of all equations in physics. This structured session will introduce Einstein's field equations to acoustics. The scope of this session will include: 1 nonlinear acoustics on curvilinear spacetime to include gravitational field 2 derivation of acoustic field equations on curvilinear spacetime, for applications to both fluids and elastic solids. This will include topics of drug delivery and force of levitation.

Papers on experimental or theoretical techniques for modelling sound generation, sound propagation and sound radiation in flow ducts will be presented in this session. Of special interest are experimental and theoretical techniques for: characterizing in-duct sound sources, propagation of sound in duct systems with flow and sound radiation from duct openings.

Modelling of acoustic limers and mufflers as well as other noise reduction techniques for ducted systems and particularly relevant for this session.

Current Research and Related Technologies

The purpose of this structured session is to report on the latest developments of research works in the field of acoustic emission AE. It is a well-known and promising field of condition monitoring, testing and diagnosis as nondestructive natures in different fields of industrial and biomedical applications. Papers presented in this session can focus on numerical or experimental investigations related to any research of AE applications in structural testing, monitoring, evaluating, characterizing, diagnostics, etc.

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Papers related to AE sensors, sensing systems, related signal processing or any other new technique to the concerned fields are also welcome to the session. Even though it is seen as a last resort solution, hearing protection is still widely used in the industry to protect workers from harmful noise. This session covers various aspects related to the use, selection, care and maintenance of hearing protection devices HPD. It includes subjective and objective measurements of the performance of HPD attenuation, occlusion effect, etc.

This session is aimed, but not limited to studies on assessment and control of human exposure to vibration, biodynamic responses to hand-arm and whole-body vibration, health effects and epidemiology of occupational exposure to vibration, motion sickness and vibration perception. It also covers various topics such as suspension seats, antivibration gloves, hand-held tools, vehicle dynamics and ergonomic intervention and regulations related to vibration exposure. Pierre Marcotte Send an email. Whatever their size, workshops often have noise problems.

More to the point smaller entities seldom enjoy a private internal health and safety service, or environmental control for that matter, and solely rely on the labour ministry doctor — if available and willing to dabble in environmental matters. The following aspects are especially tackled in this session: i Noise in the environment overview of regulations, consequences on operations, monitoring the noise, noise reduction problems ; ii Noise at the workstations outdoors assessing noise exposure, reducing noise at the source, planning the work to reduce the noise exposure, case of maintenance people ; iii Considerations with regards to the industrial building overview of regulations, requirements for acoustic absorption, reducing the sound propagation, ensuring alarm signals can be safely heard, while making sure the neighbourhood is suitably protected ; iv Legal considerations: While one may emit recommendations and hope for the best, most of the time it is necessary to implement regulations in order to achieve a result.

But is it sufficient to edit a regulation if nobody is in charge of applying it? Furthermore, even in the European Union where the rules are supposed to be identical in each member country, is the law applied in the same spirit everywhere? This session aims to compare experience gained in various countries and over a broad range of subjects, and wonder about the potential perspectives.

How Vibration Acoustics Works -

This session aims at collecting research and studies on theoretical and experimental subjects related to the reduction of noise and vibration generated by machinery and machine components. Papers are welcome concerning the machine vibroacoustic design as well as current and future noise and vibration control strategies. The studies on innovative numerical and experimental techniques for the analysis of sound sources and generation mechanisms are of special interest.

Eleonora Carletti Send an email. This structured session aims to bring together research and expertise on different subjects related to acoustic flexible materials, perforated panels or sheets, metal foams, and damping materials. Contributions in this session can cover new theoretical, manufacturing 3D printing , or experimental approaches concerning various types of materials that can be subjected to different types of excitation. Specific topics related to new and current materials may include: airborne sound absorption, airborne and impact sound insulation, damping, propagation of sound in porous media, effect of airflow, vibration and noise control systems, and design of sound absorbent ducts.

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This session welcomes new findings on materials for noise and vibration control. This structured session aims to bring together research and expertise on different subjects related to damping materials. This session welcomes new findings on materials for vibration control. Acoustics is a classic field of inquiry that has enjoyed a strong revival during the past two decades, propelled mainly by the advent of phononic crystals and acoustic metamaterials, two newly developed research areas that focused on man-made structures with acoustic properties not commonly found in nature.

Forum > Forum I: Simulation Methods

Both phononic crystals and acoustic metamateials are composite structures comprising materials of different mass densities and hardness. In the case of acoustic metamaterials, however, the response of the composite to external excitations can differ from a rigid solid by having internal relative motions between the different material components. The past fifteen years have witnessed the novel capabilities that can arise from such locally resonant sonic materials, which are characterized not only by their subwavelength physical size, but also by their effective mass density and bulk modulus that can exhibit negative values.

There are tremendous scope in the applications of acoustic metamaterials and phononic crystals, such as acoustic superlens, acoustic cloaking, aeroacoustic cloaks. The recent discovery of metamaterial as artificial phase transition manifested in quantum metamaterial producing artificial superconductivity and metamaterial as route to high temperature superconductivity.

Permmitivity, permeability, effective bulk modulus and effective mass density are transport properties. Metamaterials with singularity behaviour of transport properties at point of local resonance similar to that of singularity at critical point of phase transition. Based on transport properties, one can go beyond acoustic and electromagnetic metamaterials to other forms of metamaterials. With metamaterials as artificial phase transition, one can control the degree of phase transition.

The unusual phenomena exhibited by the phononic crystals and acoustic metamaterials, as well as their underlying physics, are the subjects of this structured session. This special session will cover the following topics: phononic crystals ; nonlinear phononic crystals ; band-gap metamaterial; negative refraction; double negative metamaterial; acoustic cloaking; aeroacoustic cloak; acoustic diodes; acoustic waveguides and resonators based on metamaterial; application of phononic device to communication; sound insulation panel using metamaterial; vibration reduction using metamaterial; acoustic metamaterial as artificial phase transition.

Gan Send an email Wonju Jeon Send an email. The purpose of this structured session is to report on the latest research and development works carried out in the field of sound absorption measurements and analysis conducted in reverberation rooms. Papers presented in this session can focus on experiments carried out in research laboratories. Modelling of sound field and measurements of the absorption coefficient even at low frequencies few hundred Hertz and below are other examples.

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This session is concerned with all aspects of hearing technology and enhancement of speech for pediatric and adult populations. Contributions addressing benefits, outcomes, or challenges related to all types of hearing devices including acoustic hearing aids, hearing assistive technology such as wireless remote microphone systems, personal sound amplification products, cochlear implants and other implantable devices are invited. The session will also include presentations of technology and techniques that aim to improve speech understanding.

This session will cover current research on the development of speech tests for both clinical applications and auditory fitness for duty evaluations. Papers can focus on various aspects, including test material, administration and scoring for non-native listeners, language proficiency issues, the use of realistic test material and stimuli, test administration via telephone or over the internet, outcome measures differing from the traditional word recognition scores, and many more. Papers describing various stages of the test development process are welcomed.

This technical session focuses on the implementation of personal hearing protection in safe working routines. Papers addressing comfort, problems with communication and situational awareness, as well as issues encountered with standard hearing protectors, augmented devices and Tactile Communication And Protective Systems TCAPS are welcome.