Spectral analyses were applied to the courtship songs of the mutants cacophony (cac), dissonance (diss), fruitless (fru), and period (per), as well as to the double mutant cac diss. Aberrant intervals between song pulses were observed in diss, cac, cac diss, and fru songs. diss males displayed a defect in song hums manifested by an irregular sine wave, although the fundamental frequencies were ...

The internal seiche structure of a small, shallow lake (Frains Lake, Michigan) is shown to be dominated by the higher order vertical modes. The resonalit frequencies and the vertical velocity profiles of each mode were predicted from observed temperature profiles. The ohserved resonant frequencies and observed phase shifts in the velocity profiles of each mode corresponded closely to those pred...

We investigate the acoustic realization of tone in continuous utterances in Sepedi (a language in the Southern Bantu family). Human labelers marked each of the 271 syllables in a 15-sentence corpus produced by a single speaker as "high" or "low". Automatic pitch extraction was then used to estimate the fundamental frequencies of the voiced segments of each of these syllables. Statistical analys...

In this paper, we propose a nonuniform DFT based on nonequispaced sampling in the frequency domain. It is useful to detect some specific frequencies such as in DTMF which is composed on two different frequencies, main (fundamental) frequency component among lots of harmonics, and feature detection from noisy signals. Some trials for nonuniform data processing via DFT are discussed and resamplin...

We have examined the effects on the fundamental behavior of the dynamics of applying constraints to control the aphysical flow of zero-point energy in classical trajectories of molecular systems. Test calculations on the popular Henon-Heiles potential surface show that these costraints can induce physically undesirable effects in the dynamics, e.g., changing quasiperiodic motion (characterized ...

At high frequencies, the dynamics of a Josephson array shows fundamental differences from its low-frequency behavior. We consider a simple array where the high-frequency effects are dominant, a current biased series array without any external load. Despite the absence of a load, the oscillators are dynamically coupled at high frequencies, and synchronized states can be attracting. We investigat...