Results 211 to 220 of about 39,770 (265)
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The Journal of the Acoustical Society of America, 1966
The historical progress, of the science of acoustics is surveyed from the earliest recorded phenomena and theories to the present status of the subject. Considerable attention is paid to the development of both mathematical and experimental tools for studying the production, propagation, and reception of sound, particularly in the 18th and 19th ...
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The historical progress, of the science of acoustics is surveyed from the earliest recorded phenomena and theories to the present status of the subject. Considerable attention is paid to the development of both mathematical and experimental tools for studying the production, propagation, and reception of sound, particularly in the 18th and 19th ...
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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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Acoustic Neuromas and the Acoustic Impedance of the Ear
Journal of Speech and Hearing Disorders, 1973The acoustic impedance at the tympanic membrane was measured at frequencies in the range 100–1000 Hz and found to be abnormal on the affected side in four patients with acoustic neuroma. In all four the resistance was abnormally high at low frequencies on the affected side, and in three the reactance of the affected ear was raised relative to that of ...
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The Journal of the Acoustical Society of America, 1985
Acoustic cavitation has been found to belong to the class of deterministically chaotic systems [W. Lauterborn and E. Cramer, Phys. Rev. Lett. 47, 1445 (1981); W. Lauterborn and E. Suchla, Phys. Rev. Lett. 53, 2304 (1984)]. Experiments are described in further support of this view by constructing phase spaces from measured data and by determining the ...
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Acoustic cavitation has been found to belong to the class of deterministically chaotic systems [W. Lauterborn and E. Cramer, Phys. Rev. Lett. 47, 1445 (1981); W. Lauterborn and E. Suchla, Phys. Rev. Lett. 53, 2304 (1984)]. Experiments are described in further support of this view by constructing phase spaces from measured data and by determining the ...
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Current Treatment Options in Neurology, 2002
Patients with acoustic neuromas have several treatment options that include observation, surgical resection, stereotactic radiosurgery, and fractionated radiotherapy. Resection is indicated for patients with larger tumors that have caused major neurologic deficits from brain compression.
Douglas, Kondziolka +2 more
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Patients with acoustic neuromas have several treatment options that include observation, surgical resection, stereotactic radiosurgery, and fractionated radiotherapy. Resection is indicated for patients with larger tumors that have caused major neurologic deficits from brain compression.
Douglas, Kondziolka +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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The Journal of the Acoustical Society of America, 1935
Previous to the development of amplifiers most of the instruments used in acoustical research depended for their operation upon purely mechanical principles. This paper includes a brief survey of such of these instruments as are still of interest in connection with the investigation of technical or research problems in acoustics, but it deals primarily
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Previous to the development of amplifiers most of the instruments used in acoustical research depended for their operation upon purely mechanical principles. This paper includes a brief survey of such of these instruments as are still of interest in connection with the investigation of technical or research problems in acoustics, but it deals primarily
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2020
In the setting of a voice clinic, the voice may be assessed in a number of different ways. As a bare minimum, assessment should include stroboscopic examination, patient self-reported questionnaires, and clinician-reported perceptual evaluation. In addition, recordings of the voice may be analyzed using computer software: several different measures ...
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In the setting of a voice clinic, the voice may be assessed in a number of different ways. As a bare minimum, assessment should include stroboscopic examination, patient self-reported questionnaires, and clinician-reported perceptual evaluation. In addition, recordings of the voice may be analyzed using computer software: several different measures ...
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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 ...
Kai Melde +3 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 ...
Kai Melde +3 more
openaire +4 more sources