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Acoustic cloaking and transformation acoustics
Journal of Physics D: Applied Physics, 2010In this review, we give a brief introduction to the application of the new technique of transformation acoustics, which draws on a correspondence between coordinate transformation and material properties. The technique is formulated for both acoustic waves and linear liquid surface waves.
Che Ting Chan +2 more
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Nature, 2016
Holographic techniques are fundamental to applications such as volumetric displays, high-density data storage and optical tweezers that require spatial control of intricate optical or acoustic fields within a three-dimensional volume. The basis of holography is spatial storage of the phase and/or amplitude profile of the desired wavefront in a manner ...
Peer Fischer +4 more
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Holographic techniques are fundamental to applications such as volumetric displays, high-density data storage and optical tweezers that require spatial control of intricate optical or acoustic fields within a three-dimensional volume. The basis of holography is spatial storage of the phase and/or amplitude profile of the desired wavefront in a manner ...
Peer Fischer +4 more
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Redshift of acoustic waves in acoustic streaming
Physical Review E, 2003Redshift, namely, the frequency decline in the frequency spectrum of an acoustic wave in water, was observed by measuring the frequency spectrum of acoustic streaming in a standing wave field. We desire that relations of the energy epsilon and momentum mu of acoustic waves analogous to those under quantum conditions hold, that is, epsilon =n(p)h(omega),
Toshitaka Fujii +2 more
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Acoustical barrier with acoustical seal
The Journal of the Acoustical Society of America, 1994An acoustical barrier, an aperture and a pipe or cable passing therethrough wherein the aperture has a number of radially extending slits which define a plurality of radial sectors which also extend from the aperture. One or more grooves are arranged in the sectors concentrically about the aperture to increase the radial flexibility of the sectors so ...
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ACOUSTIC IMAGINATION AND ACOUSTIC HALLUCINATION
Archives of Neurology And Psychiatry, 1935Acoustic imagination has always attracted the attention of psychologists. Charcot distinguished three types of imagination in human beings: the optic, the auditory and the motor. It is generally supposed that the acoustic and the motor types are closely related to each other. Baerwald,1in a study of image types, mentioned acoustic imagination.
Sam Parker, Paul Schilder
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Sleep Medicine Reviews, 2010
Snoring is a prevalent disorder affecting 20-40% of the general population. The mechanism of snoring is vibration of anatomical structures in the pharyngeal airway. Flutter of the soft palate accounts for the harsh aspect of the snoring sound. Natural or drug-induced sleep is required for its appearance.
Micheline M D De Meyer +2 more
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Snoring is a prevalent disorder affecting 20-40% of the general population. The mechanism of snoring is vibration of anatomical structures in the pharyngeal airway. Flutter of the soft palate accounts for the harsh aspect of the snoring sound. Natural or drug-induced sleep is required for its appearance.
Micheline M D De Meyer +2 more
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2016
From the earliest stages of Greek thought, sound was thought to originate as the result of an impact between two objects. At first it was believed that the swiftness and force of the impact affected both volume and pitch; then it became clear that these were two different parameters.
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From the earliest stages of Greek thought, sound was thought to originate as the result of an impact between two objects. At first it was believed that the swiftness and force of the impact affected both volume and pitch; then it became clear that these were two different parameters.
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Acoustic Dose and Acoustic Dose-Rate
Ultrasound in Medicine & Biology, 2009Acoustic dose is defined as the energy deposited by absorption of an acoustic wave per unit mass of the medium supporting the wave. Expressions for acoustic dose and acoustic dose-rate are given for plane-wave conditions, including temporal and frequency dependencies of energy deposition.
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