Variable Frequency Multiplier Technique for High-Efficiency Conversion Over a Wide Operating Range by Afridi, Khurram K., Inam, Wardah, Perreault, David J

“…This technique compresses the effective operating range required of a resonant converter by switching the inverter and/or the rectifier operation between processing energy at a fundamental frequency and one or more harmonic frequencies. …”
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ACCRETION TORQUES AND MOTION OF THE HOT SPOT ON THE ACCRETING MILLISECOND PULSAR XTE J1807-294 by Patruno, Alessandro, Wijnands, R., Chakrabarty, Deepto, van der Klis, Michiel, Hartman, Jacob M., Ph. D. Massachusetts Institute of Technology

“…The pulse arrival time residuals of the fundamental frequency follow a linear anti-correlation with the fractional amplitudes that suggests hot spot motion both in longitude and latitude over the surface of the neutron star. …”
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A Framework for Biomarkers of COVID-19 Based on Coordination of Speech-Production Subsystems by Quatieri, Thomas F., Talkar, Tanya, Palmer, Jeffrey S.

“…Preliminary results: An exploratory study with audio interviews of five subjects provides Cohen's d effect sizes between pre-COVID-19 (pre-exposure) from post-COVID-19 (after positive diagnosis but asymptomatic) using: coordination of respiration (as measured through acoustic waveform amplitude) and laryngeal motion (fundamental frequency and cepstral peak prominence), and coordination of laryngeal and articulatory (formant center frequencies) motion. …”
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Close-range vocal interaction in the common marmoset (Callithrix jacchus) by Landman, Rogier, Sharma, Jitendra, Hyman, Julia B, Fanucci-Kiss, Adrian, Meisner, Olivia, Parmar, Shivangi, Feng, Guoping, Desimone, Robert

“…Animals placed outside the home cage increased their trill call rate and uttered more trills in response to their partner compared to strangers. The fundamental frequency, F0, of trills increased when animals were placed outside the cage. …”
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Development of consonance preferences in Western listeners. by Weiss, Michael W, Cirelli, Laura K, McDermott, Josh H, Trehub, Sandra E

“…Preferences for consonance increased with age and were predicted by changing preferences for harmonicity-the degree to which a sound's frequencies are multiples of a common fundamental frequency-but not by evaluations of beating-fluctuations in amplitude that occur when frequencies are close but not identical, producing the sensation of acoustic roughness. …”
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Development of consonance preferences in Western listeners. by Weiss, Michael W, Cirelli, Laura K, McDermott, Josh H, Trehub, Sandra E

“…Preferences for consonance increased with age and were predicted by changing preferences for harmonicity-the degree to which a sound's frequencies are multiples of a common fundamental frequency-but not by evaluations of beating-fluctuations in amplitude that occur when frequencies are close but not identical, producing the sensation of acoustic roughness. …”
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MATLAB implementation of an operational modal analysis technique for vibration-based structural health monitoring by Ojeda, Alejandro P

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Design of fault-tolerant machine for hybrid aircraft by Tan, Swee Chong

“…The high-power loss is due to the high fundamental frequency of the FSPM machine. The PMSM on the other hand shows promising results due to its ability to provide high power with high amount of efficiency. …”
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F0 correlates of stress in Thai by Potisuk, Siripong, Gandour, Jackson T., Harper, Mary P.

“…An experiment was conducted to investigate changes in the fundamental frequency (F0) contours of Thai tones in connected speech as a function of stress. …”
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On parallel structure RC for better performance and NN based tilc for a class of nonlinear systems by Liu, Tianqi

“…As a result, robust response is achieved in fractional cases where sampling frequency is not integer multiple of fundamental frequency. As an application, a high-performance grid simulator controlled by parallel structure fractional repetitive controller is designed and implemented. …”
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Judgment of infant cry: The roles of acoustic characteristics and sociodemographic characteristics by Esposito, Gianluca, Nakazawa, Jun, Venuti, Paola, Bornstein, Marc H.

“…Using tree-based models, we found that judgments of the level of distress the infant was expressing as well as the level of distress listeners felt are mainly accounted for by select acoustic properties of infant cry (proportion of sound/pause, fundamental frequency, and number of utterances), whereas age estimates of a crying infant are determined mainly by listener sociodemographic characteristics (gender and parental status). …”
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Cells alignment and accumulation using acoustic nozzle for 3D printing by Sriphutkiat, Yannapol, Kasetsirikul, Surasak, Ketpun, Dettachai, Zhou, Yufeng

“…With the acoustic excitation, microparticles were accumulated at the center of the nozzle and consequently printed construct at the fundamental frequency of 871 kHz. The distribution of microparticles fits well with a Gaussian distribution. …”
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PENGARUH FILTER PASIF PADA JARINGAN TEGANGAN RENDAH AKIBAT PEMBEBANAN SISTEM PENGGERAK DENGAN KECEPATAN YANG DAPAT DIATUR by , DJODI ANTONO BTECH, , Dr. Eng. F. Danang Wijaya, ST. MT.

“…The quality of electrical power can be called good when current and voltage wave is in pure sinusoidal form, the phases differ from each other 180 degrees and the fundamental frequency is 50 Hertz. If does not sinusoidal form, it means there is a problem in electrical power it is the presence of harmonics. …”

TONISITAS DALAM INTONASI DIALOG SPONTAN BAHASA JAWA NGOKO (KAJIAN FONETIK AKUSTIK) by , Eni Suryati, , Prof. Soepomo Poedjosoedarmo

“…PRAAT analysis is used to look at the pitch movement by observing the fundamental frequency (F0). Segmentation of syllables in PRAAT text grid allows us to read carefully the range of pitch for all syllables. …”

Discriminative classification model of filled pause and elongation for Malay language spontaneous speech / Raseeda Hamzah by Hamzah, Raseeda

“…Several wellestablished features such as Formant Frequency (FF), Fundamental Frequency (F0), Mel Frequency Cepstral Coefficients (MFCC), Zero Crossing Rates (ZCR) and Short Time Energy (STE) were used in this research. …”
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Pure antimony film as saturable absorber for Q-switched erbium-doped fiber laser by Rahman, M.F.A., Zhalilah, M.Z., Latiff, A.A., Rosol, A.H.A., Lokman, M.Q., Bushroa, Abdul Razak, Dimyati, Kaharudin, Harun, Sulaiman Wadi

“…Within this range, the repetition rate increases from 70.82 to 98.04 kHz, while pulse width decreases from 7.42 to 5.36 μs. The fundamental frequency signal-to-noise ratio of the pulse signal is 74 dB, which indicates the excellent stability of the pulses. …”

Highly stable mode-locked fiber laser with graphene oxide-coated side-polished D-shaped fiber saturable absorber by Ahmad, Harith, Soltani, Soroush, Thambiratnam, Kavintheran, Yasin, Moh

“…The cavity has a length of 12.5 m with a fundamental frequency of 16.5 MHz and operates in the anomalous dispersion regime. …”

Titanium dioxide fiber saturable absorber for Q-switched fiber laser generation in the 1-micrometer region by Rahman, Mohd Fauzi Ab, Reddy, Pinninty Harshavardhan, Paul, Mukul Chandra, Das, Shyamal, Dhar, Anirban, Baharom, Mohd Faizal, Latiff, Anas Abdul, Rusdi, Muhammad Farid Mohd, Wang, Pengfei, Dimyati, Kaharudin, Harun, Sulaiman Wadi

“…The narrowest pulse width of 2.55 μs was attained at the maximum pump power of 233 mW, while the signal-to-noise ratio of the fundamental frequency was 47 dB. This demonstration reveals that the proposed TiO 2 DF SA is feasible for constructing a flexible and reliably stable Q-switched pulsed fiber laser in the 1-micrometer region. © 2019 Optical Society of America.…”

Sompoton: Sabah bamboo mouth organ by Hamdan, Sinin, Rahman, Md Rezaur, Mohamad Said, Khairul Anwar, Zainal Abidin, Ana Sakura, Musib, Ahmad Fauzi

“…All three sompotons displayed almost similar fundamental frequencies. The individual tubes 1, 2, 3, 4, 5, 6, and 8 (except tube 7) of sompoton I, II, and III produced the fundamental frequency (in hertz) as 924, 758, 655, 589, 449, 407, 537, as 954, 779, 655, 614, 469, 387, 552, and as 944, 820, 655, 635, 407, 407, and 552, respectively. …”

Time frequency analysis of peking gamelan by Hamdan, Sinin, Musoddiq, Iran Amri, Musib, Ahmad Faudzi, Sawawi, Marini

“…Melda analyzer reading proved that all peking sustained the initial fundamental frequency and overtone at t=0 until 2s. TFA from Adobe reading provides a description of the sound in the time-frequency plane. …”
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