A Simple Computational Scheme for Determining the Sound Speed of an Acoustic Medium from Its Surface Impulse Response

1987 ◽  
Vol 8 (4) ◽  
pp. 501-520 ◽  
Author(s):  
Paul Sacks ◽  
Fadel Santosa
Keyword(s):  
Impulse Response ◽  
Sound Speed ◽  
Computational Scheme ◽  
Acoustic Medium

Computing Where Perturbations Affect the Acoustic Impulse Response in the Ocean

2018 ◽  
Vol 26 (02) ◽  
pp. 1850004
Author(s):  
John L. Spiesberger ◽  
Dmitry Yu Mikhin
Keyword(s):  
Wave Equation ◽  
Acoustic Wave ◽  
Impulse Response ◽  
Sound Speed ◽  
Acoustic Signals ◽  
Technological Advance ◽  
Propagation Model ◽  
Acoustic Wave Equation ◽  
Finite Frequency ◽  
The One

We compute accurate maps of oceanic perturbations affecting transient acoustic signals propagating from source to receiver. The technological advance involves coupling the one-way wave equation (OWWE) propagation model with the theory for the Differential Measure of Influence (DMI) yielding the map. The DMI requires two finite-frequency solutions of the acoustic wave equation obeying reciprocity: from source to receiver and vice versa. OWWE satisfies reciprocity at basin-scales with sound speed varying horizontally and vertically. At infinite frequency, maps of the DMI collapse into rays. Mapping the DMI is useful for understanding measurements of acoustic perturbations at finite frequencies.

Influence of the Test Voltage Function over Lightning Impulse Response Parameters Measured by Long Cable

2018 ◽  
Vol 138 (3) ◽  
pp. 242-248 ◽  
Author(s):  
Shuji Sato ◽  
Seisuke Nishimura ◽  
Hiroyuki Shimizu ◽  
Hisatoshi Ikeda
Keyword(s):  
Impulse Response ◽  
Lightning Impulse ◽  
Test Voltage

Fractional Vector-Order h-Realisation of the Impulse Response Function

2020 ◽  
Vol 14 (2) ◽  
pp. 108-113
Author(s):  
Ewa Pawłuszewicz
Keyword(s):  
Control Systems ◽  
Impulse Response ◽  
Response Function ◽  
Impulse Response Function ◽  
Linear Control ◽  
Linear Control Systems

AbstractThe problem of realisation of linear control systems with the h–difference of Caputo-, Riemann–Liouville- and Grünwald–Letnikov-type fractional vector-order operators is studied. The problem of existing minimal realisation is discussed.

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