Results 121 to 130 of about 25,812 (165)

Sound Absorbing Acoustic Horns

1986
Abstract : An exploratory study of acoustic horns as non-reflective liners for water-filled anechoic tanks was conducted. The goal was to determine if a suitably shaped horn could improve the reflection loss characteristics of acoustic materials. Horns were constructed and tested.
Basil Vassos, Walter M. Madigosky, Richard W. Harrison   +2 more
openaire   +1 more source

Sound Manipulation With Acoustic Metamaterials

ASME 2012 Noise Control and Acoustics Division Conference, 2012
Acoustic metamaterials are engineered materials with properties hard or impossible to find in natural materials (e.g. negative effective density and/or negative bulk modulus). Therefore, a myriad of novel applications could be imagined and some of them have already been theoretically and/or experimentally demonstrated.
Lucian Zigoneanu, Bogdan-Ioan Popa, Steven A. Cummer   +2 more
openaire   +1 more source

Super-Sound Acoustic Solitons

1985
In order to explain such phenomena as heat conductivity, heat expansion and others, it is necessary to take into account the nonlinearity (or anharmonicity) of the interactions between molecules in solids. As a result of anharmonicity, phonons interact with each other, and this leads to their scattering and to the production of heat.
openaire   +1 more source

Acoustics and Aerodynamic Sound

2014
Music, calm speech, whispering leaves fluttering in a breeze are pleasant and desirable sounds. Noise, howling gales, explosions and screeching traffic are less so. A quantitative understanding of the sources of all such sounds can be obtained by careful analysis of the mechanical equations of motion. This is provided by Acoustics and Aerodynamic Sound,
openaire   +1 more source

Acoustic archaeology: sound science or sound and fury?

New Scientist, 2010
The idea that our ancestors built for acoustic effect has recently been gaining ground. But how much is design, and how much accident?
openaire   +1 more source

Additively Manufactured Deformation‐Recoverable and Broadband Sound‐Absorbing Microlattice Inspired by the Concept of Traditional Perforated Panels

Advanced Materials, 2021
Xinwei Li, Wei Zhai
exaly  

Sound induces analgesia through corticothalamic circuits

Science, 2022
Wenjie Zhou, Ye Chonghuan, Haitao Wang
exaly  

Flexible MXene/Bacterial Cellulose Film Sound Detector Based on Piezoresistive Sensing Mechanism

ACS Nano, 2022
Nishuang Liu, Zhi Zhang, Kaifei Gao
exaly  

Acoustic Imaging: Seeing with Sound

2009
We have seen that power of imaging with electromagnetic energy is tremendous. By imaging with the appropriate wavelength of electromagnetic energy, materials that we normally think of as completely opaque become transparent, revealing hidden wonders. Objects that we think of as dark look light, and light objects look dark; indeed the whole notion of ...
openaire   +1 more source

Second sound attenuation near quantum criticality

Science, 2022
Xi Li, Xiang Luo, Shuai Wang
exaly