Instead of spreading throughout the room from the loudspeakers, the sound of the "olleh" converges onto your mouth, almost as if time itself had been reversed. Indeed, the process is known as time-reversed acoustics, and the array in front of you is acting as a "time-reversal mirror."...
Time reversed acoustics The objective of this paper is to show that time-reversal invariance can be exploited in acoustics to accurately control wave propagation through complex m... Fink,Mathias - American Institute of Physics 被引量: 1882发表: 1997年 Time-reversed acoustics The South Anyui Sutu...
A combination of time reversed acoustics and nonlinear elastic wave spectroscopy techniques is introduced to localize surface breaking defects in a non-destructive manner. Reciprocal time reversal is applied at two neighbouring positions in order to create a vibration dipole with high amplitudes. At surf...
Time reversed acoustics. Physics Today 50, 34–40 (1997). 5. Montaldo, G. et al. Telecommunication in a disordered environment with iterative time reversal. Waves Random Media 14, 287–302 (2004). 6. Lerosey, G. et al. Time reversal of electromagnetic waves and telecommunication. Radio ...
Using variational principles only, and without these mentioned assumptions and/or additional mathematical tools, we show that the time-reversed adjoint wavefield should be defined as a premise that leads to the correct adjoint equations. This allows us to clarify mathematical inconsistencies found in ...
In a homogeneous medium, the refocusing resolution of the time-reversed signal is limited by diffraction. When the medium has random inhomogeneities the resolution of the refocused signal can in some circumstances beat the diffraction limit. This is super-resolution. A theoretical treatment of this ...
Time-reversed acoustics Physics Today (1997) Fitzmaurice, M., 2006. Use of 2.4GHz Frequency Band for CBTC Data Communication Systems, Parson Corp., JCR06, IEEE Veh... Kyritsi, P., Papanicolaou, G., 2005. One-bit Time Reversal for WLAN Applications. IEEE 16th PIMRC. vol. 1. pp... ...
Time-reversed acoustics in random media and in chaotic cavities The objective of this paper is to show that time reversal invariance can be exploited in acoustics to accurately control wave propagation through propagati... M Fink,JD Rosny - 《Nonlinearity》 被引量: 40发表: 2001年 1-D elastic...
It also can be used to express the time-reversed signal in such a way that wecan select precisely the destination site of the signal. Finally, we show some possible practical applications of thisproblem.doi:10.22201/icat.16656423.2004.2.02.579J.M. Velázquez-Arcos...
Time-reversed acoustics. Rep. Progr. Phys. 63, 1933–1995 (2000). Article ADS Google Scholar Liang, B., Yuan, B. & Cheng, J.-C. Acoustic Diode: Rectification of Acoustic Energy Flux in One-Dimensional Systems. Phys. Rev. Lett. 103, 104301 (2009). Article ADS Google Scholar Liang...