Longitudinal Changes in Pitch-Related Acoustic Characteristics of the Voice Throughout the Menstrual Cycle: Observational Study av Jaycee Kaufman, Jouhyun Jeon, Jessica Oreskovic, Anirudh Thommandram, Yan Fossat

“…ObjectiveThe aim of the study is to explore how fundamental frequency features vary between menstrual phases using daily voice recordings. …”
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Study of the effects of local geological structure on seismic ground motion and building vulnerability with microtremors av Andrej Gosar

“…Especially dangerous is the situation when both the fundamental frequency of sediments and of structures are similar and a resonance occurs. …”
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Impact of a Three-Week Workplace Vocal Health Promotion Program on a Teacher and Students' Voice Parameters av Lady Catherine Cantor-Cutiva, Adriana Maria Cantor-Cutiva

“…The WVHPP was found to be statistically associated with a decrease in the fundamental frequency, standard deviation of the fundamental frequency, sound pressure levels, and SPL standard deviation among both pupils and their teacher. …”
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Helmholtz Resonance in Korean Bells av Junghyun Kim

“…The equation can be used by traditional Korean bell installers to design the well and gap to ensure that the Helmholtz frequency of the resonator matches the fundamental frequency of the bell.…”
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Gender Affirming Laryngeal and Voice Surgery av Rakesh Srivastava

“…Feminization surgery can modify vocal folds (fundamental frequency [Fo]) and vocal tract (resonance frequency). …”
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Effect of Ligament Fibers on Dynamics of Synthetic, Self-Oscillating Vocal Folds in a Biomimetic Larynx Model av Bogac Tur, Lucia Gühring, Olaf Wendler, Samuel Schlicht, Dietmar Drummer, Stefan Kniesburges

“…This range of the fundamental frequency corresponds to the reproduction of a female normal and singing voice range. …”
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Research on sub/super‐synchronous oscillation suppression method for direct‐drive wind turbine based on energy compensation av Jing Ma, Min Zhang, A. G. Phadke

“…And then, with the compensation energy of supplementary branches reaching the maximum and the increment of fundamental‐frequency voltage being the minimum as the objective, and with the frequency‐domain characteristic and fundamental‐frequency voltage characteristic of control links being satisfied as constraints, a scheme to optimize the compensation coefficients of multiple branches is established. …”
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Regulated Two-Dimensional Deep Convolutional Neural Network-Based Power Quality Classifier for Microgrid av Cheng-I Chen, Sunneng Sandino Berutu, Yeong-Chin Chen, Hao-Cheng Yang, Chung-Hsien Chen

“…Once the power imbalance is present between the generation and the load demand, the fundamental frequency would deviate from the nominal value. …”
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POWER ELECTRONIC SYSTEM FOR POWER ELECTRIC VEHICLES WITH ALGORITHMS OF SYNCHRONOUS MODULATION av Oleschuk V., Ermuratskii V.

“…Spectra of the phase voltage of system do not contain even harmonics and subharmonics (of the fundamental frequency), which is especially important for drives for the medium-power and high-power electric vehicles.…”
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Educational project on a simple voice identification using mel-frequency cepstrum coefficients and vector quantization av Akmeliawati, Rini, Widhiputranto, H. K.

“…This paper presents an educational project on a simple voice identification system, which uses two parameters of voice features: the fundamental frequency or pitch and the vocal tract information represented by Mel-Frequency Cepstrum Coefficients (MFCC). …”
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Conical-shaped variable stiffness composite laminates: Design and fiber path planning av Mohammad Sheikhi, Mirmeysam Rafiei Anamagh, Bekir Bediz, Lutfi Taner Tunc

“…It employs the spectral Chebyshev method to solve dynamic equations, optimizing lamination parameters to maximize fundamental frequency. Subsequently, the fiber angles at the sampling points across the domain are retrieved. …”
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Power Consumption Analysis of Electrical Installations at Healthcare Facility av Emmanuel Guillen-Garcia, Angel L. Zorita-Lamadrid, Oscar Duque-Perez, Luis Morales-Velazquez, Roque Alfredo Osornio-Rios, Rene de Jesus Romero-Troncoso

“…An analysis in the acquired current and voltage signals is done, in order to compare the power consumption centered in the fundamental frequency with the generalized definition of power consumption. …”
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A Novel High-Performance Beam-Supported Membrane Structure with Enhanced Design Flexibility for Partial Discharge Detection av Chenzhao Fu, Wenrong Si, Haoyong Li, Delin Li, Peng Yuan, Yiting Yu

“…Compared with the intact membrane (IM) structure commonly used by EFPI sensors, BSM structure provides extra geometrical parameters to define the fundamental frequency when the diameter of the whole membrane and its thickness is determined, resulting in an enhanced design flexibility of the sensor structure. …”
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Occurrence of vocal changes in preschoolers with no voice complaints: an auditory-perceptual and acoustic analysis av Gabriela Samanttha Cavalcanti do Nascimento, Giselle Frutuoso do Nascimento, Juliana Fernanda Dias da Silva, Sandro Júnior Henrique Lima, Zulina Souza de Lira, Adriana de Oliveira Camargo Gomes

“…There was no difference between the sexes in the auditory-perceptual findings. The fundamental frequency in the group with changes was lower than that in the group without changes. …”
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Rolling Bearing Fault Diagnosis Based on Optimal Notch Filter and Enhanced Singular Value Decomposition av Bin Pang, Yuling He, Guiji Tang, Chong Zhou, Tian Tian

“…The impulsive fault feature signal of rolling bearings at the early failure stage is easily contaminated by the fundamental frequency (i.e., the rotation frequency of the shaft) signal and background noise. …”
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Modeling and frequency tracking of marine mammal whistle calls av Severson, Jared

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Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations av Zhou, Yufeng, Sriphutkiat, Yannapol

“…The simultaneous excitation of the fundamental frequency and its third harmonic, which is termed as dual-frequency excitation, to a pair of interdigital transducers (IDTs) could generate a new type of standing acoustic waves in a microfluidic channel. …”
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Deflection test and modal analysis of lightweight timber floors av Xinyue Zhao, Yujie Huang, Haiyan Fu, Yunlu Wang, Zheng Wang, Usama Sayed

“…The evaluation of the deflection value of the floor structure, the mode shape, the coupling of the fundamental frequency mode parameters, and the vibration comfort were also studied. …”
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The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth av Damian Węgrzyn, Piotr Wrzeciono, Alicja Wieczorkowska

“…The obtained results prove that the proximity of an obstacle affects the sound’s fundamental frequency, as the airflow speed coming out of the flue pipe’s mouth changes. …”
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Modeling ferroresonance phenomena on voltage transformer (VT) av Askari, Mohammad Tolou

“…Results also show that while fundamental frequency and subharmonic ferroresonancc can occur under commonplace operating conditions, chaotic states are unlikely in practice.…”
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