In a search for spectral parameters that can be used to distinguish and to model fricatives, spectral moments, dynamic amplitude, and slope above maximum amplitude were computed for a fricative corpus including sustained fricatives at di erent e ort levels, and fricatives in vowel context. Moments varied signi cantly by frequency range used in computation. M3 appeared to vary the least across f...

Abstract— Internet protocols frequently create periodic patterns in traffic. Examples included packets paced by bottleneck links, periodic exchange of information such as routing, transport-layer effects such as TCP self-clocking, and application-level effects. Although measurement of such periodicities could shed light on Internet traffic, current understanding of periodic behavior in general ...

For experimental studies of transition from laminar to turbulent boundary layer flow it is important to know the ambient noise spectrum in the facility. In supersonic wind tunnels this is often assessed by measuring pitot pressure noise. A discussion of such measurements is given, e. g., by Salyer et al. [1], see also Parziale et al. [2]. The question arises as to whether the noise measured by ...

background the importance of proper qualitative evaluation of eeg parameters during surgery has been recognized since many years. although none of the characteristics based on the frequency, entropy, and bi spectral characteristics have been regarded as a good predictor for detection of the depth of anesthesia alone. so it seems necessary to study multiple characteristics together. objectives i...

Seismic waves are non-stationary due to its propagation through the earth. Time-frequency transforms are suitable tools for analyzing non-stationary seismic signals. Spectral decomposition can reveal the non-stationary characteristics which cannot be easily observed in the time or frequency representation alone. Various types of spectral decomposition methods have been introduced by some resear...

In this paper, we have investigated the dependence of the spectral entanglement and indistinguishability of photon pairs produced by the spontaneous parametric down-conversion (SPDC) procedure on the bandwidth of spectral filters used in the detection setup. The SPDC is a three-wave mixing process which occurs in a nonlinear crystal and generates entangled photon pairs and utilizes as one of th...

Two models that predict perceived timbral brightness in terms of the centroid of the frequency spectrum were investigated. One model simply uses the centroid of the frequency spectrum, the other divides this same value by the fundamental frequency: the latter scales the centroid of the frequency spectrum with the fundamental frequency. Different single tone and pitch combinations, presented seq...

The recent proliferation of terrestrial and space-based communication systems has given rise to an increasingly critical problem—the lack of available frequency spectrum. One tool that satellite system designers can use to maximize the use of available spectrum is bandwidth-efficient modulation. This technique can enhance bandwidth efficiency while retaining reasonable power efficiency and impl...