Summary We study the problem of diffraction by a right-angled no-contrast penetrable wedge means two-complex-variable Wiener–Hopf approach. Specifically, analyticity properties unknown (spectral) functions equation are studied. show that these spectral can be analytically continued onto two-complex dimensional manifold, and unveil their singularities in C2. To do so, integral representation for...

Owing to optical refraction, external rays that are incident upon a high-refractive-index medium fall within a small internal cone angle. A one-dimensionally periodic Bragg structure can reflect over an angular acceptance range that is greater than the small internal refraction cone, if the internal refractive-index contrast is sufficient. Thus Winn et al. [Opt. Lett. (to be published)] charted...

This study examines the contrast between (alveo-)palatal stop bursts and velar stop bursts (/c/ vs. /k/), with particular focus on how the contrast between the two is enhanced in Word-initial vs. Word-medial position. Data are presented from nine speakers of Pitjantjatjara, a language of Central Australia. Analyses show that although there are formant differences between palatal and velar stop ...