Results 261 to 270 of about 106,747 (303)
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Spinal motor responses to acoustic stimulation
Experimental Neurology, 1964Abstract Certain aspects of the mechanisms mediating auditory-induced spinal motor activity have been examined by recording within the brain stem and from spinal motoneurons at both cervicothoracic and lumbosacral levels. Single auditory click stimulation elicits, in lightly strychninized cats, motor responses appearing along both sides of the spinal
Bo E. Gernandt, Harlow W. Ades
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An evaluation of antenatal fetal acoustic stimulation
European Journal of Obstetrics & Gynecology and Reproductive Biology, 1991Fetal heart rate reactivity was evaluated following acoustic stimulation testing (AST). The AST and NST (non-stress test) were compared with regards to certain adverse perinatal outcome criteria, and in a selected sample of cases, to other surveillance tests. These tests were the oxytocin challenge test (OCT) and biophysical profile (BPP).
Yahya Daoud +5 more
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Stimulated emission of phonons in an acoustical cavity [PDF]
Physical Review B, 1997 Stimulated emission is studied of phonons resonant with the metastable Zeeman-split Ē(2E) doublet in ruby. Initial population inversion of this two-level system is prepared by selective pulsed optical pumping, and the ensuing stimulated emission of resonant phonons is observed via an accelerated growth of the luminescence intensity emanating from the ...
Jaap I. Dijkhuis +2 more
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Respiratory and Arousal Responses to Acoustic Stimulation
Chest, 1997Although sleep-related obstructive apnea is most often associated with transient arousal, the impact of this arousal on respiratory control remains unclear. We tested the hypotheses that acoustic arousing stimulation can generate a significant respiratory response during sleep in healthy subjects and that the magnitude or timing of this response is ...
David W. Carley +4 more
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Damage of the basilar membrane by acoustic stimulation
Archives of Oto-Rhino-Laryngology, 1981Sound exposures of more than 130 dB lead to typical tears in the basilar membrane in the area of maximal damage. The position, size, and number of these tears are evaluated.
H. Spoendlin, H. Rauchegger
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A mechanism for stimulated acoustic emissions in the cochlea
Hearing Research, 1985Stimulated acoustic emissions in the cochlea are explained in terms of its hydraulic properties. The mathematical model predicts that these 'echoes' are caused by reflections which result from a discontinuity in the resistive and reactive components of the impedance which occurs at resonance.
A.E. Bunn, R.W. Guelke
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Ultrasound-Stimulated Vibro-Acoustic Spectrography
Science, 1998An ultrasound method based on radiation force is presented for imaging the acoustic response of a material to mechanical excitation. Acoustic energy was emitted from solids and tissues in response to an oscillatory radiation force produced by interfering focused beams of ultrasound. Frequency spectra of ultrasound-stimulated acoustic emission exhibited
James F. Greenleaf, Mostafa Fatemi
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Properties of the generator of stimulated acoustic emissions
Hearing Research, 1980In Part I, the sound emitting properties of the peripheral auditory system are briefly reviewed and links with other literature are cited. (Summary of Symposium section introduction). In Part II, the stimulation of acoustic emissions by clicks is examined experimentally and analytically, in order to specify the physical qualities and parameters of the ...
D.T. Kemp, R. Chum
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On acoustic stimulation of atmospheric precipitation
Technical Physics, 2005Stimulation of atmospheric precipitation by acoustic waves is considered. The interaction of acoustic waves with fog particles and the acoustic coagulation phenomenon are analyzed. It is proposed that the effect of amplification of sound in a weakly ionized gas be used to prevent sound decay away from the source in a foggy environment.
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Near Wellbore Stimulation by Acoustic Waves
SPE European Formation Damage Conference, 2003Abstract Reduced well productivity or injectivity is often caused by near-wellbore formation damage due to the interaction of reservoir formation with drilling and completion fluids. The problem can be further compounded by production induced formation damage.
Sau-Wai Wong +3 more
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