Results 31 to 40 of about 3,088,219 (346)

Improved sound absorption with 3D-printed micro-perforated sandwich structures

Journal of Materials Research and Technology
The micro-perforated sandwich structure based on triply periodic minimal surfaces (TPMS) is a lightweight, high-strength and multi-functional structure, which integrates heat exchange, impact resistance, energy absorption, etc., and has been widely used ...
Peng-Fei Zhang, Zhong-Hua Li, Yu-Jun Zhou, Qi-Fei Zhang, Bin Liu, Fei Liu, Si-Chen Pei, Ke Shi, Pei-kang Bai   +8 more
doaj   +1 more source

Nonlinear acousto-electric transport in a two-dimensional electron system

, 2000
We study both theoretically and experimentally the nonlinear interaction between an intense surface acoustic wave and a two-dimensional electron plasma in semiconductor-piezocrystal hybrid structures.
A. L. Belostotskii, A. L. Efros, A. O. Govorov, A. V. Chaplik, A. V. Chaplik, A. V. Kalameitsev, A. Wixforth, A. Wixforth, B. A. Auld, C. W. Skorupka, E. Yablonovich, G. R. Nash, G. Weinreich, I. L. Drichko, I. L’Heureux, J. M. Shilton, J. P. Kotthaus, J. R. A. Beale, K. A. Ingebrigtsen, K.-H. Hoffmann, L. I. Magarill, M. J. Hoskins, M. K. Balakirev, M. K. Balakirev, M. Rotter, M. Rotter, M. Rotter, M. Rotter, M. Rotter, N. Botkin, P. K. Tien, P. N. Butcher, R. C. Ho, R. L. Willett, R. M. White, S. H. Simon, V. G. Mozhaev, V. I. Fal’ko, V. I. Talyanskii, V. L. Gurevich, V. L. Gurevich, W. J. Tanski, Yu. V. Gulyaev, Yu. V. Gulyaev   +43 more
core   +2 more sources

Mobile phones: a trade-off between speech intelligibility and exposure to noise levels and to radio-frequency electromagnetic fields [PDF]

, 2019
When making phone calls, cellphone and smartphone users are exposed to radio-frequency (RF) electromagnetic fields (EMFs) and sound pressure simultaneously. Speech intelligibility during mobile phone calls is related to the sound pressure level of speech
Aerts, Sam, Aminzadeh, Reza, Bockstael, Annelies, Botteldooren, Dick, Declerck, Sofie, Joseph, Wout, Martens, Luc, Thielens, Arno   +7 more
core   +2 more sources

Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band

Materials, 2022
For the common difficulties of noise control in a low frequency region, an adjustable parallel Helmholtz acoustic metamaterial (APH-AM) was developed to gain broad sound absorption band by introducing multiple resonant chambers to enlarge the absorption ...
Xiaocui Yang, Fei Yang, Xin-min Shen, Enshuai Wang, Xiaonan Zhang, Cheng Shen, Wen-qiang Peng   +6 more
semanticscholar   +1 more source

Atmospheric Absorption of Sound [PDF]

The Journal of the Acoustical Society of America, 1972
By assuming air is composed of four gases, i.e., nitrogen, oxygen, water vapor, and carbon dioxide, and applying energy transfer rates for the binary collisions inherent in such a system, absorption of sound in the atmosphere has been predicted. The calculated curves based upon 24 energy transfer mechanisms are compared with experimental data over the ...
L. B. Evans, H. E. Bass, L. C. Sutherland   +2 more
openaire   +1 more source

Feasibility and Tolerability of Performing Portable MRI for Neurological Disorders in an Outpatient Neurology Clinic: A Prospective Cohort

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Accessing brain magnetic resonance imaging (MRI) can be challenging, especially for underserved patients, which may lead to disparities in neurological diagnosis. Method This mixed‐methods study enrolled adults with one of four neurological disorders: mild cognitive impairment or dementia of the Alzheimer type, multiple sclerosis ...
Maya L. Mastick, Nomin Enkhtsetseg, Joseph Sadok, Matheus Mochetti, Annabel Sorby Adams, Jennifer Guo, Cristina Trapaga Hacker, Isabella Gomez Hjerthen, Seungwon Lee, Siddharth Satish, Andrew S. Ham, Justin Hill, Denis Balaban, Kevin Kyle, Rebecca L. Gillani, Marcelo Matiello, Aleksandar Videnovic, Eric C. Klawiter, W. Taylor Kimberly, Farrah J. Mateen   +19 more
wiley   +1 more source

Utilizing Agricultural Waste Materials for the Development of Sustainable Sound Absorption Materials [PDF]

Nature Environment and Pollution Technology
Environmental pollution is escalating due to inadequate waste management, with the open burning of agricultural waste being a significant contributor. This process releases various harmful gases into the environment.
Venkatesan B., Kannan V., Raja Priya P. and Karthiga Shenbagam N
doaj   +1 more source

Improved low-frequency sound absorption of porous silicone rubber resonance sheet with periodic cavities

Journal of Low Frequency Noise, Vibration and Active Control, 2022
Since the development of advanced sound absorption material is highly critical in noise control applications, anechoic coatings, and acoustic metamaterials, both fabrication technology and structure design are significant in the achievement of broadband ...
Longgui Peng, Pu Zhao, Huanquan Cheng, Qirui He, Lifei Du   +4 more
doaj   +1 more source

A hybrid acoustic structure for low-frequency and broadband underwater sound absorption

Journal of Low Frequency Noise Vibration and Active Control, 2022
The underwater anechoic coating with local resonant units is an effective method to achieve low-frequency sound absorption. However, the structure obtained in this way is not satisfactory in the sound absorption effect of mid-high frequency bands ...
Xinyu Jia, G. Jin, Kangkang Shi, C. Bu, Tiangui Ye   +4 more
semanticscholar   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source