Results 71 to 80 of about 14,726 (253)

Theoretical and experimental investigation on the sound absorption performance of ultra-thin curled acoustic metasurface

Journal of Low Frequency Noise, Vibration and Active Control
A simplified model of the absorption coefficient of traditional Helmholtz resonators (THR) was established, and the influence of different geometric parameters on the absorption coefficient of THR was analyzed.
Baozhu Cheng, Jiesen Zhang, Yang Liu, Jiaqi Sun, Bin Li, Hong Hou   +5 more
doaj   +1 more source

Optimization of the Sound Absorption Coefficient (SAC) from Cellulose-Silica Aerogel Using the Box-Behnken Design. [PDF]

ACS Omega, 2022
Silviana S, Prastiti EC, Hermawan F, Setyawan A.   +3 more
europepmc   +1 more source

A Recyclable and Biodegradable High‐Performance Piezoelectric Nanogenerator for Self‐Powered Biosensing and Assistive Human‐Machine Interaction

Advanced Science, EarlyView.
By exploiting multiscale hydrogen‐bonding interactions between HFPD and TOCNF, the composite simultaneously achieves a high piezoelectric coefficient (14.0 pC·N−1), outstanding flexibility (100 000 bending cycles), water‐assisted recyclability, excellent biodegradability, and sensitive wearable/implantable sensing for motion, speech, and Morse code ...
Tingshuai Luo, Tian Xiao, Luyu Zhang, Bailang Zhang, Shengchang Lu, He Xiao, Jianguo Li, Kai Liu, Chaoji Chen, Hui Wu   +9 more
wiley   +1 more source

Correction to "Optimization of the Sound Absorption Coefficient (SAC) from Cellulose-Silica Aerogel Using the Box-Behnken Design". [PDF]

ACS Omega, 2022
Silviana S, Prastiti EC, Hermawan F, Setyawan A.   +3 more
europepmc   +1 more source

Closing the Loop: High‐Precision 3D Photofabrication in Living Tissues

Advanced Science, EarlyView.
Writing 3D microstructures inside living tissue demands more than laser access; It demands information. Hierarchical sensing captures thermal and mechanical states across pulse‐train, voxel, and structure timescales, feeding a controller that steers the laser in real time.
Amirbahador Zeynali, Mangirdas Malinauskas, Giuseppe Chirico   +2 more
wiley   +1 more source

Basic Study for Acoustic Absorption Characteristics of Soft and Light Granular Material (Basic Characteristics for Expanded Polystyrene Beads)

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2013
In this paper fundamental sound absorption characteristics of expanded polystyrene beads with several geometries are reported when they are packed in some thick layers with and without back air space.
Shuichi SAKAMOTO, Masaru SASAKI, Itaru KOURAKATA, Kensaku YANAGIMOTO, Seiji WATANABE   +4 more
doaj   +1 more source

Prediction of the Sound Absorption Coefficient of Three-Layer Aluminum Foam by Hybrid Neural Network Optimization Algorithm. [PDF]

Materials (Basel), 2022
Mi H, Guo W, Liang L, Ma H, Zhang Z, Gao Y, Li L.   +6 more
europepmc   +1 more source

Mode‐Resolved Phonon Dynamics Under Chemical Pressure in SnTe Thermoelectrics

Advanced Science, EarlyView.
Chemical pressure reshapes low‐energy optical phonons in SnTe, altering their dispersion and scattering with heat‐carrying acoustic modes. Positive and negative pressure states modify phonon frequencies and lifetimes in distinct ways, revealing how mode‐selective lattice perturbations regulate acoustic–optical interactions and suppress lattice thermal ...
Zhihao Li, Jianhong Hu, Panpan Peng, Peng Cao, Hui Zhang, Yujie Zong, Yanhui Wu, Hongchao Wang   +7 more
wiley   +1 more source

Estimation of the Acoustic Properties of the Random Packing Structures of Granular Materials: Estimation of the Sound Absorption Coefficient Based on Micro-CT Scan Data. [PDF]

Materials (Basel), 2022
Sakamoto S, Suzuki K, Toda K, Seino S.
europepmc   +1 more source

Sound absorption coefficients and acoustical design

, 1961
Third International Congress on Acoustics ...
Northwood, T. D., Balachandran, C. G.
openaire   +1 more source