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Björn A. T. Petersson

Bio: Björn A. T. Petersson is an academic researcher. The author has contributed to research in topics: Audio frequency & Soundproofing. The author has an hindex of 1, co-authored 1 publications receiving 458 citations.

Papers
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Book
01 Jan 1973
TL;DR: A Little Dynamics Survey of Wave Types and Characteristics as discussed by the authors : Damping, Impedance and Mobility, Attenuation of Structure-Borne Sound, Sound Radiation from Structures, Generation and Measurement of Structure Borne Sound
Abstract: A Little Dynamics- Survey of Wave Types and Characteristics- Damping- Impedance and Mobility- Attenuation of Structure-Borne Sound- Sound Radiation from Structures- Generation and Measurement of Structure-Borne Sound

473 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors review how reciprocity breaks down in materials with momentum bias, structured space-dependent and time-dependent constitutive properties, and constitutive nonlinearity, and report on recent advances in the modelling and fabrication of these materials, as well as on experiments demonstrating nonreciprocal acoustic and elastic wave propagation therein.
Abstract: The law of reciprocity in acoustics and elastodynamics codifies a relation of symmetry between action and reaction in fluids and solids. In its simplest form, it states that the frequency-response functions between any two material points remain the same after swapping source and receiver, regardless of the presence of inhomogeneities and losses. As such, reciprocity has enabled numerous applications that make use of acoustic and elastic wave propagation. A recent change in paradigm has prompted us to see reciprocity under a new light: as an obstruction to the realization of wave-bearing media in which the source and receiver are not interchangeable. Such materials may enable the creation of devices such as acoustic one-way mirrors, isolators and topological insulators. Here, we review how reciprocity breaks down in materials with momentum bias, structured space-dependent and time-dependent constitutive properties, and constitutive nonlinearity, and report on recent advances in the modelling and fabrication of these materials, as well as on experiments demonstrating nonreciprocal acoustic and elastic wave propagation therein. The success of these efforts holds promise to enable robust, unidirectional acoustic and elastic wave-steering capabilities that exceed what is currently possible in conventional materials, metamaterials or phononic crystals. Nonreciprocal acoustic and elastic wave propagation may enable the creation of devices such as acoustic one-way mirrors, isolators and topological insulators. This Review presents advances in the creation of materials that break reciprocity and realize robust, unidirectional acoustic and elastic wave steering.

245 citations

BookDOI
01 Jan 2002

240 citations

BookDOI
01 Jan 1985
TL;DR: The structure and development of the Central Nervous System of Arachnids and its role in Spider Vibration Sense is studied.
Abstract: A The Central Nervous System: Structure and Development.- I Patterns of Arrangement and Connectivity in the Central Nervous System of Arachnids.- II Ontogeny of the Arachnid Central Nervous System.- III The Stomatogastric Nervous System and Neurosecretion.- B Structure and Function of Sensory Systems.- Vision.- IV The Morphology and Optics of Spider Eyes.- V The Fine Structure of Spider Photoreceptors in Relation to Function.- VI Photoreceptor Cells in the Spider Eye: Spectral Sensitivity and Efferent Control.- Mechano- and Chemoreception.- VII Mechano- and Chemoreceptive Sensilla.- VIII Trichobothria.- IX Slit Sensilla and the Measurement of Cuticular Strains.- Sensory Nerves and Peripheral Synapses.- X Sensory Nerves and Peripheral Synapses.- C Senses and Behavior.- XI Neuroethology of the Spider Vibration Sense.- XII Spider Proprioception: Receptors, Reflexes, and Control of Locomotion.- XIII Target Discrimination in Jumping Spiders (Araneae: Salticidae).- XIV Homing Behavior and Orientation in the Funnel-Web Spider, Agelena labyrinthica Clerck.- XV Analytical Cybernetics of Spider Navigation.- D The Motor System.- XVI Neural Control of the Heartbeat and Skeletal Muscle in Spiders and Scorpions.- XVII Central and Peripheral Organization of Scorpion Locomotion.- E Neurobiology of a Biological Clock.- XVIII Neurobiology of a Circadian Clock in the Visual System of Scorpions.

204 citations

Journal ArticleDOI
TL;DR: In this article, the authors present theoretical modeling of the sound transmission loss through double-leaf lightweight partitions stiffened with periodically placed studs, and compare the predictions with existing test data for steel plates with wooden stiffeners, and good agreement is obtained.

187 citations

Journal ArticleDOI
TL;DR: In this article, the spectral element (SE) method and the Bloch theorem were combined with the spectral equation for complex band structure calculation in metamaterial-based elastic rods with periodically attached multi-degree-of-freedom spring mass resonators.
Abstract: Wave propagation and vibration transmission in metamaterial-based elastic rods containing periodically attached multi-degree-of-freedom spring–mass resonators are investigated. A methodology based on a combination of the spectral element (SE) method and the Bloch theorem is developed, yielding an explicit formulation for the complex band structure calculation. The effects of resonator parameters on the band gap behavior are investigated by employing the attenuation constant surface plots, which display information on the location, the width and the attenuation performance of all band gaps. It is found that Bragg-type and resonance-type gaps co-exist in these systems. In some special situations, exact coupling between Bragg and resonance gaps occurs, giving rise to super-wide coupled gaps. The advantage of multi-degree-of-freedom resonators in achieving multiband and/or broadband gaps in metamaterial-based rods is demonstrated. Band gap formation mechanisms are further examined by analytical and physical models, providing explicit formulae to locate the band edge frequencies of all the band gaps.

179 citations