scholarly journals Broad bandwidth of perceptual learning in second-order contrast modulation detection

2015 ◽  
Vol 15 (2) ◽  
pp. 20-20 ◽  
Author(s):  
J. Zhou ◽  
F. Yan ◽  
Z.-L. Lu ◽  
Y. Zhou ◽  
J. Xi ◽  
...  
Keyword(s):  
Perceptual Learning ◽  
Second Order ◽  
Broad Bandwidth ◽  
Modulation Detection

Effects of amplitude compression on first- and second-order modulation detection thresholds in cochlear implant listeners

2004 ◽  
Vol 43 (5) ◽  
pp. 264-270 ◽  
Author(s):  
Christian Lorenzi ◽  
Jérome Sibellas ◽  
Christian Füllgrabe ◽  
Stéphane Gallégo ◽  
Claude Fugain ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Second Order ◽  
Detection Thresholds ◽  
Amplitude Compression ◽  
Modulation Detection

scholarly journals Three-dimensional surface gravity waves of a broad bandwidth on deep water

2021 ◽  
Vol 926 ◽  
Author(s):  
Yan Li
Keyword(s):  
Deep Water ◽  
Water Waves ◽  
Order Approximation ◽  
Three Dimensional ◽  
Finite Depth ◽  
Second Order ◽  
Leading Order ◽  
Broad Bandwidth ◽  
Stokes Waves ◽  
Deep Water Waves

A new nonlinear Schrödinger equation (NLSE) is presented for ocean surface waves. Earlier derivations of NLSEs that describe the evolution of deep-water waves have been limited to a narrow bandwidth, for which the bound waves at second order in wave steepness are described in leading-order approximations. This work generalizes these earlier works to allow for deep-water waves of a broad bandwidth with large directional spreading. The new NLSE permits simple numerical implementations and can be extended in a straightforward manner in order to account for waves on water of finite depth. For the description of second-order waves, this paper proposes a semianalytical approach that can provide accurate and computationally efficient predictions. With a leading-order approximation to the new NLSE, the instability region and energy growth rate of Stokes waves are investigated. Compared with the exact results based on McLean (J. Fluid Mech., vol. 511, 1982, p. 135), predictions by the new NLSE show better agreement than by Trulsen et al. (Phys. Fluids, vol. 12, 2000, pp. 2432–2437). With numerical implementations of the new NLSE, the effects of wave directionality are investigated by examining the evolution of a directionally spread focused wave group. A downward shift of the spectral peak is observed, owing to the asymmetry in the change rate of energy in a more complex manner than that for uniform Stokes waves. Rapid oblique energy transfers near the group at linear focus are observed, likely arising from the instability of uniform Stokes waves appearing in a narrow spectrum subject to oblique sideband disturbances.

scholarly journals Perceptual learning of auditory spectral modulation detection

2012 ◽  
Vol 218 (4) ◽  
pp. 567-577 ◽  
Author(s):  
Andrew T. Sabin ◽  
David A. Eddins ◽  
Beverly A. Wright
Keyword(s):  
Perceptual Learning ◽  
Spectral Modulation ◽  
Modulation Detection

scholarly journals Perceptual learning in first- and second-order letter identification

2004 ◽  
Vol 4 (8) ◽  
pp. 296-296 ◽  
Author(s):  
B. A. Doshe ◽  
Z.-L. Lu
Keyword(s):  
Perceptual Learning ◽  
Second Order ◽  
Letter Identification
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