Results 161 to 170 of about 1,501,574 (297)

Low phase noise frequency synthesizer

, 2021
The time-efficient design of a complete phase-locked loop (PLL) frequency synthesizerrequires good knowledge of non-ideal effects of each sub-block on the system performance.This thesis is an attempt to study the different aspects of the design of RFfrequency synthesizers to be used in wireless transceivers.
openaire   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Audiological, Phonatory and Cardiac Correlates of Individuals Exposed to Low-Frequency Noise or at Risk of Vibroacoustic Disease. [PDF]

Int Arch Otorhinolaryngol, 2023
Verma H, Shah J, Singh A, Singh S, Sharma B, Shukla B.   +5 more
europepmc   +1 more source

Multifunctional Crushing and Piezoresistive Self‐Sensing in Conductive Epoxy/CNT‐Coated Polyetherimide TPMS Lattices

Advanced Engineering Materials, EarlyView.
This study reports lightweight polyetherimide triply periodic minimal surfaces lattices coated with carbon nanotube‐reinforced epoxy that combine mechanical robustness with self‐sensing. The conformal coating enhances stiffness, strength and energy absorption while enabling reliable strain monitoring.
A. Triay, J. Schneider, P. Harrison, S. Kumar   +3 more
wiley   +1 more source

The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method. [PDF]

Int J Prev Med, 2022
Forouharmajd F, Nazaryan K, Fuente A, Pourabdian S, Asady H.   +4 more
europepmc   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

A multifunctional ultra-thin acoustic membrane with self-healing properties for adaptive low-frequency noise control. [PDF]

Sci Rep, 2022
Boccaccio M, Myronidis K, Thielke M, Meo M, Pinto F.   +4 more
europepmc   +1 more source

The validation and application of a rotor acoustic prediction computer program [PDF]

An essential prerequisite to reducing the acoustic detectability of military rotorcraft is a better understanding of main rotor noise which is the major contributor to the overall noise.
Gallman, Judith M.
core   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Acoustic Metamaterials for Low-Frequency Noise Reduction Based on Parallel Connection of Multiple Spiral Chambers. [PDF]

Materials (Basel), 2022
Duan H, Yang F, Shen X, Yin Q, Wang E, Zhang X, Yang X, Shen C, Peng W.   +8 more
europepmc   +1 more source