Results 261 to 270 of about 1,283,393 (314)
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Sensitivity to rate-of-change of frequency transition
The Journal of the Acoustical Society of America, 1983We examined a possible psychoacoustic basis for the relatively invariant duration over which the rapid formant frequency transitions cueing place of articulation occur in initial-position stop consonants such as /ba/. Our stimuli consisted of a 200-ms duration compound of a pure-tone frequency glide followed by a steady-state pure-tone stimulus. Glides
Donald G. Jamieson, E. Slawinska
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Influence of rate of change of frequency on the overall pitch of frequency-modulated tones
The Journal of the Acoustical Society of America, 2001The mechanism(s) determining pitch may assign less weight to portions of a sound where the frequency is changing rapidly. The present experiments explored the possible effect of this on the overall pitch of frequency-modulated sounds. Pitch matches were obtained between an adjustable unmodulated sinusoid and a sinusoidal carrier that was frequency ...
H, Gockel, B C, Moore, R P, Carlyon
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Adaptive algorithm for estimation of voltage phasor, frequency and rate of change of frequency
European Transactions on Electrical Power, 1994AbstractThis paper presents results in the design of an adaptive algorithm for real‐time estimation of voltage phasor, frequency and its rate of change. The new algorithm, separated in two stages, is based on the non‐recursive “Least Error Squares Technique” (LS Technique).
Terzija, V., Djuric, M.
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Colonization rates of tracheostomy tubes associated with the frequency of tube changes
ANZ Journal of Surgery, 2020AbstractBackgroundTracheostomy‐tube change protocols are implemented primarily due to concern regarding infections. Currently changes vary from within 4 weeks post‐insertion to 3 monthly thereafter. However, currently no evidence‐based guidelines exist to justify these protocols.
Dulitha Kumarasinghe +5 more
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Secure Under Frequency Load Shedding Scheme with Consideration of Rate of Change of Frequency
2021 IEEE Green Technologies Conference (GreenTech), 2021By increasing the number of severe frequency events in the network, which might lead to an islanding incident, the need for using an adaptive special protection scheme has been highlighted. In this paper, an efficient method for obtaining the optimal values of under frequency load shedding (UFLS) relay settings is presented to minimize the amount of ...
Farhad Elyasichamazkoti +1 more
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Evidence for sensitivity to rates of change of frequency and intensity
The Journal of the Acoustical Society of America, 1987Thresholds for the detection of differences in duration were measured in a two-alternative forced-choice task for four types of signals, all centered at 2 kHz with a mean level of 65 dB SPL: (1) sinusoids fixed in frequency and level; (2) sinusoids of fixed frequency whose level was swept up or down by 5 or 10 dB; (3) sinusiods of fixed level whose ...
Gary J. Dooley, Brian C. J. Moore
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Rate of change of frequency - a power quality descriptor
2014 16th International Conference on Harmonics and Quality of Power (ICHQP), 2014The smart grids paradigm includes newly defined real time control strategies, and therefore detailed models for the energy transfer are required together with new algorithms for information retrieval. Although today measurement infrastructure (including the high reporting rate measurement devices, like Phasor Measurement Units) is capable to give ...
Mihaela Albu +2 more
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Rates of change in gene frequency in tetrasomic organisms
Genetica, 1971The potentialities of diploid and tetraploid organisms for conserving variation which is genetical information are compared. While tetraploidy enhances the conservation of variation, it does not in general appear to do so by a factor of two, which might have been expected from the difference in the amount of genetic material.
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Rate change detection of frequency modulated signals: developmental trends
jbcpp, 2011Abstract Background: The aim of this study was to examine developmental trends in rate change detection of auditory rhythmic signals (repetitive sinusoidally frequency modulated tones). Methods: Two groups of children
Ravit, Cohen-Mimran, Shimon, Sapir
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A Technique for Digital Relays to Measure Frequency and its Rate of Change
IFAC Proceedings Volumes, 1989Abstract Several techniques for measuring frequency at a power system bus have been proposed for use in digital relays. This paper presents a new technique for measuring frequency and demonstrates a procedure for calculating the rate of change of frequency. The effect of noise in the input signal is examined.
M.S. Sachdev, Jianping Shen
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