× خانه ژورنال ها پست ها ثبت نام ورود

نتایج جستجو برای Sound waves

تعداد نتایج: 137634  
2008
Daniel J. Eisenstein, Charles L. Bennett,

© 2008 American Institute of Physics, S-0031-9228-0804-010-6 Relativistic sound waves raced through the hot plasma that filled the universe for its first 380 000 years. That sound left an imprint that is still discernible in the cosmic microwave background and also in the large-scale distribution of galaxies. Measurements of the sound waves manifested in the CMB, coupled with a detailed underst...

2009
Robert L. Merlino,

A historical overview of some of the early theoretical and experimental work on dust acoustic waves is given. The basic physics of the dust acoustic wave and some of the theoretical refinements that have been made, including the effects of collisions, plasma absorption, dust charge fluctuations, particle drifts and strong coupling effects are discussed. Some recent experimental findings and out...

Journal: :EAI Endorsed Trans. Context-aware Syst. & Appl. 2016
Nguyen Dang Binh,

We propose a new method to recognize gestures from sound waves. The main contribution of this paper is to recognize gestures based on the analysis of short-time Fourier transforms (STFT) using the Doppler effect to sense gestures. To do this, we generate an inaudible tone, which gets frequency-shifted when it reflects off moving objects like the hand. We measure this shift with the microphone t...

2016
R. Cairns, R. Bingham, R. Dendy, C. Nairn, P. Shukla, A. Mamun,

We show that a non-thermal electron distribution may change the nature of ion acoustic solitons. If the ions are assumed to respond as a fluid to perturbations in the potential, with no significant trapping in a potential well, then a thermal plasma only supports a solitary waves with a density peak. However, with a suitable distribution of non-thermal particles, solitary waves with both densit...

1996
B. Temple, R. Young,

We demonstrate the existence of solutions to the full 3 x 3 system of com-pressible Euler equations in one space dimension, up to an arbitrary time T > 0, in the case when the initial data has arbitrarily large total variation, and sufficiently small supnorm. The result applies to periodic solutions of the Euler equations, a nonlinear model for sound wave propagation in gas dynamics. Our analys...

2017
Christian Brendel, Vittorio Peano, Oskar Painter, Florian Marquardt,

2005
Clarence Barlow,

ISIS, for ‘Intra-Samplar Interpolating Sinusoids’, is a means of mathematically interpolating sine wave segments between the samples of a sound wave recording (the word “sample” is here used as in “sample rate”). The sound wave is thus representable as a sequence of sine-tone pitches in extremely small time windows in the microsecond domain, rendering the wave audible as a rapid sine-tone ‘melo...

2015
G. Brodin, Lennart Stenflo, L. Stenflo,

We reconsider the nonlinear resonant interaction between three electrostatic waves in a magnetized plasma. The general coupling coefficients derived from kinetic theory are reduced here to the low-frequency limit. The main contribution to the coupling coefficient we find in this way agrees with the coefficient recently presented in Annales Geophysicae. But we also deduce another contribution wh...

2016
Ben Bengler, Nick Bryan-Kinns,

Collidoscope is an interactive, collaborative sound installation and musical instrument that allows participants to seamlessly record, manipulate, explore and perform real-world sounds. Collidoscope is designed for both amateurs and professional musicians. Author

2016
Paulina Kanigowska, Yue Shen, Yijing Zheng, Susan Rosser, Yizhi Cai,

Acoustic droplet ejection (ADE) technology uses focused acoustic energy to transfer nanoliter-scale liquid droplets with high precision and accuracy. This noncontact, tipless, low-volume dispensing technology minimizes the possibility of crosscontamination and potentially reduces the costs of reagents and consumables. To date, acoustic dispensers have mainly been used in screening libraries of ...