Results 51 to 60 of about 73,479 (256)

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

Advanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami, Hengzhe Ren, Erqian Dong, Ashkan Ghanbarzadeh‐Dagheyan, Chen Shen   +4 more
wiley   +1 more source

Urban soundscape preferences in relation to the function of a place: Case studies in Warsaw

Miscellanea Geographica: Regional Studies on Development, 2018
The survey interviewed three hundred and nine people in five public places within Warsaw. The aim of the survey was to examine if people’s sound preferences are related to a place’s function and how these preferences differentiate.
Romanowska Małgorzata
doaj   +1 more source

Acoustical Environment Studies in the Modern Urban University Campuses

Acoustics, 2022
The quality of the acoustic environments at Xi’an Jiatong-Liverpool University (XJTLU) and Soochow University (Dushuhu Campus, SUDC) in Suzhou City were investigated in the present work through real-time noise level measurements and questionnaire surveys.
Hsiao Mun Lee, Heow Pueh Lee, Zhiyang Liu   +2 more
doaj   +1 more source

Demonstrating Vibrational Current Generation With a Self‐Assembled Bioelectret

Advanced Functional Materials, EarlyView.
Vacuum‐deposited films of the plant‐derived molecule, Baicalein, form a self‐assembled bioelectret exhibiting spontaneous orientation polarization and a giant surface potential. The films induce alternating current during the vibration of a movable electrode without charging treatments. Hydrocarbon protection enhances the air stability of the Baicalein
Kouki Akaike, Yukihiro Shimoi, Qingshuo Wei, Yutaro Ono, Satomi Hosono, Yoichi Yamada, Haruhisa Akiyama, Shunsuke Tanaka   +7 more
wiley   +1 more source

A Comparative Study of In Situ Methodologies for Assessment of RF EMF Exposure From a 5G FR2 Base Station

IEEE Access
In this work, in situ measurements of the radio frequency electromagnetic field exposure have been conducted for an indoor massive MIMO 5G base station operating at 26–28 GHz.
Samuel Goegebeur, Kenneth Deprez, Davide Colombi, Jens Eilers Bischoff, Carla Di Paola, Bram Stroobandt, Leen Verloock, Sam Aerts, Christer Tornevik, Wout Joseph   +9 more
doaj   +1 more source

Ultrawide Bandwidth Optomechanical Magnetometry Using Flux Concentration

Advanced Functional Materials, EarlyView.
High‐permeability flux concentrators enable ultrawide‐bandwidth chip‐scale optomechanical magnetometry by exploiting magnetic nonlinearity to up‐convert low‐frequency fields to the mechanical resonance, where sensitivity is optimal. This enables flat wideband operation over more than four orders of magnitude, from tens of kilohertz to sub‐hertz ...
Benjamin J. Carey, Nathaniel Bawden, Fernando Gottardo, James S. Bennett, Douglas Bulla, Scott Foster, Warwick P. Bowen   +6 more
wiley   +1 more source

Magnesium‐Based Transient Bioelectronics, Bio‐Optics and Bio‐Scaffolds

Advanced Functional Materials, EarlyView.
This paper reviews the state of the art and recent advances in magnesium‐based thin‐film, foils, and scaffolds for applications in transient bio‐optics, bioelectronics and tissue engineering. The design principles, fabrication methods, material properties, and integration strategies are discussed in detail.
Massimo Mariello, Yves Leterrier
wiley   +1 more source

The Acoustic Environment and Physiological Responses of the Fetus [PDF]

Journal of Perinatology, 2000
The acoustic environment of the fetus is composed of continuous cardiovascular, respiratory, and intestinal sounds that are punctuated by isolated, shorter bursts during maternal body movements and vocalizations. The distribution of sounds is confined to frequencies below 300 Hz.
R M, Abrams, K J, Gerhardt
openaire   +2 more sources

Polymer Substrates for Flexible Sensors: Advances and Contributions to Smart Agriculture

Advanced Functional Materials, EarlyView.
This review comprehensively summarizes recent advances in polymer‐based flexible sensors for smart agriculture, focusing on polymer substrate design, interface engineering, and applications in soil, plant, animal, aquaculture, and post‐harvest monitoring.
Yihui Li, Zhangzheng Xiao, Zheng Yan, Adnan Raza Altaf, Qun Song, Dingding Yao, Afshan Sohail, Yixin Wang, Wenxiu Ma, Shanjun Li, Yaohui Chen, Peiwen Liu, Kai Zhang   +12 more
wiley   +1 more source

Acoustical system monitoring in complex acoustic environments

2019 2nd International Colloquium on Smart Grid Metrology (SMAGRIMET), 2019
This paper investigates the impact of room acoustics and background noise on acoustical monitoring of the desired sound source and in addition, if already known room acoustics parameters can be used to increase robustness of such monitoring system.
Bogdanić, Lovre, Suhanek, Mia
openaire   +3 more sources