Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Acoustic metric"'
Autor:
Brett Newman, Matthew B. Galles
Publikováno v:
AIAA AVIATION 2020 FORUM.
This research examined the feasibility of incorporating an acoustic metric into the optimization of an aircraft trajectory to reduce the noise experienced by an observer. The method investigated a perturbed path of an unmanned aerial system with spec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6146ebd1d72bcc2f5e7c3caa3f257ef9
https://doi.org/10.2514/6.2020-2594
https://doi.org/10.2514/6.2020-2594
Autor:
Jun Yan
Publikováno v:
Physics Letters
Physics Letters B, Vol 818, Iss, Pp 136359-(2021)
Physics Letters B, Vol 818, Iss, Pp 136359-(2021)
In this paper, the acoustic metric and effective action are derived by using the shift transformation and functional integrals method, this metric can describe the fluctuation of the phonon fields in the quantum fluid. When the phonon fields are coup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::458afe90aff9dd7f251545494fca633f
https://doi.org/10.1016/j.physletb.2021.136359
https://doi.org/10.1016/j.physletb.2021.136359
Autor:
Gregory Eskin
We consider a time-dependent acoustic metric in 2+1 dimensions having a black hole and we study the Hawking type radiation from such black hole. We construct eikonals of special form with the support close to the black hole. We compute the average nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bf184d3e1b8ec2d40bf75ac9e2af1d6
http://arxiv.org/abs/1912.12775
http://arxiv.org/abs/1912.12775
Autor:
Rahul Shrivastav, Cristina Jackson-Menaldi, Eric Hunter, Lisa M. Kopf, Adam D. Rubin, Mark D. Skowronski, Katherine L. Marks, Jean Skeffington
Publikováno v:
J Voice
INTRODUCTION: The diagnoses of voice disorders, as well as treatment outcomes, are often tracked using ‘visual (e.g., stroboscopic images), auditory (e.g., perceptual ratings), objective (e.g., from acoustic or aerodynamic signals), and patient rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d9d02d06a41ba4bc910a5302b65ad7b
https://europepmc.org/articles/PMC6336519/
https://europepmc.org/articles/PMC6336519/
We investigate the properties of the condensates of cold atoms at zero temperature in the tunable binary Bose-Einstein condensate system with a Rabi transition between atomic hyperfine states. We use this system to examine the effect of quantum fluct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52a5b22f417b6cc80d434d2830db4b25
http://arxiv.org/abs/1901.11187
http://arxiv.org/abs/1901.11187
Publikováno v:
Applied Acoustics. 172:107619
The paper proposes a new method for objective sound quality evaluation for the vehicle interior noise based on the displacement of the basilar membrane in the human ear. The method was mainly carried out in four steps. Firstly, the noise samples in d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::018df347d8abc14a2b7a407680a6c484
https://doi.org/10.1016/j.apacoust.2020.107619
https://doi.org/10.1016/j.apacoust.2020.107619
Autor:
Wolfram Pannert, Christof Ocker
Publikováno v:
Applied Acoustics. 168:107422
Acoustics in a moving fluid is a simple model of an analogue space–time. The analysis shows that the null geodesics of the metric g μ ν in that space–time correspond to the rays in the eikonal approximation of geometrical acoustics. The physica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd059e369a7f3862bcee579f22c57a3c
https://doi.org/10.1016/j.apacoust.2020.107422
https://doi.org/10.1016/j.apacoust.2020.107422
Publikováno v:
International Journal of Modern Physics A. 35:2050112
In this paper we consider the acoustic metric obtained from an Abelian Higgs model extended with higher derivative terms in the bosonic sector which describes an acoustic rotating black hole and analyze the phenomena of superresonance, analogue Aharo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df8cd316467b18b49cb0697a09e108b8
https://doi.org/10.1142/s0217751x20501122
https://doi.org/10.1142/s0217751x20501122
Autor:
Satadal Datta
Publikováno v:
Physical Review D. 98
We explore nonlinear perturbations in different static fluid systems. We find that the equations, corresponding to the perturbation of the integrals of motion, i.e., Bernoulli's constant and the mass flow rate, satisfy the massless scalar field equat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6feea98eaa3cfd7b6bb5be6d6fce70f
https://doi.org/10.1103/physrevd.98.064049
https://doi.org/10.1103/physrevd.98.064049