Spectral-shape discrimination thresholds were measured in the presence and absence of noise to determine whether normal-hearing and hearing-impaired listeners rely primarily on spectral peaks in the excitation pattern when discriminating between stimuli with different spectral shapes. Standard stimuli were the sum of 2, 4, 6, 8, 10, 20, or 30 equal-amplitude tones with frequencies fixed between...

Etched multilayers obtained by forming a laminar grating pattern within interferential multilayer mirrors are used in the soft x-ray range to improve the spectral resolution of wavelength dispersive spectrometers equipped with periodic multilayers. We describe the fabrication process of such an etched multilayer dispersive element, its characterizationthrough reflectivity measurement and simula...

New divergence measures are introduced for change detection and discrimination of stochastic signals (time series) on the basis of parametric filtering — a technique that combines parametric linear filtering with correlation characterization. The sensitivity of these divergence measures is investigated using local curvatures under additive and multiplicative spectral departure models. It is fou...

Deshpande & Rankin (1999, 2001) claim that the frequency of the very narrow feature, in the spectrum of radio flux variations of PSR B0943+10, is an alias of its actual value. For this, they need to interpret the narrow feature as a very stable pattern of drifting sub pulses on the polar cap of this pulsar, within the framework of the Ruderman & Sutherland (1975) model. This paper discusses sev...

In a recent article [J. C. Brown, "Calculation of a Constant Q Spectral Transform," J. Acoust. Soc. Am. 89, 425-434 ( 1991 ) ], the calculation of a constant Q spectral transform that gives a constant pattern in the log frequency domain for sounds with harmonic frequency components has been described. This property has been utilized in calculating the cross-correlation function of spectra of so...

This paper presents an alternative solution for speech database compression aiming at the embedded application of concatenative synthesis systems. The waveform of a speech segment is firstly decomposed into a prosodic pattern and a spectral pattern by STRAIGHT – a powerful speech analysissynthesis algorithm. Then all the prosodic and spectral patterns are clustered respectively to remove the re...

In this paper, we investigate the use of heat kernels as a means of embedding graphs in a pattern space. We commence by performing the spectral decomposition on the graph Laplacian. The heat kernel of the graph is found by exponentiating the resulting eigensystem over time. By equating the spectral heat kernel and its Gaussian form we are able to approximate the geodesic distance between nodes ...

When experimenting with different graphics algorithms and their effects one has to write a lot of code in order to fully exploit today’s graphics hardware. Over the last years there have been some attempts to provide support for this recurring task. A well known example is the nVidia Effect Browser, which can be used as a testbed for numerous purposes. However it provides only limited support w...

We report on recent work to determine the CKM matrix element |Vus| using strange hadronic τ decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated α 3 s terms. Our result |Vus| = 0.2220±0.0033 is already competitive with the standard extraction from Ke3 decays an...