An experimental study of the atmospheric-driven variability of impulse sounds

Cheinet, Sylvain; Cosnefroy, Matthias; Königstein, Florian; Rickert, Winfried; Christoph, Marcus; Collier, Sandra L.; Dagallier, Adrien; Ehrhardt, Loic; Ostashev, Vladimir E.; Stefanovic, Alexandre; Wessling, Thomas; Wilson, D. Keith

doi:10.1121/1.5047750

Cited by 20 publications

(8 citation statements)

References 49 publications

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“…At present, domestic and foreign researchers have conducted some research on shock wave pressure testing in explosive fields and achieved certain research results. For example, Cheinet et al [1] from the Aberdeen Ballistic Research Laboratory in the United States conducted research on the height variation law of the three wave points in the explosion field and provided the Mach rod height variation law under typical working conditions. The experiment shows that the lower the height of the explosion center, the faster the reflection of the incident shock wave, and the higher the height of the Mach rod.…”

Section: Introductionmentioning

confidence: 99%

Research on the location of measurement points in explosion shock wave pressure testing

Zhong,

Wang,

Kong

et al. 2024

Vib. proced.

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Shock wave is an important damage element in ammunition explosion and one of the important technical indicators for evaluating its damage power. Accurately measuring shock wave pressure is of great significance for guiding ammunition design and evaluating damage power. The testing environment in the explosion field is harsh, and the measurement of shock wave pressure is affected by various influencing factors, resulting in inaccurate measurement results and low reliability. The location of pressure measurement points directly affects the measurement results of surface reflection pressure and free field pressure. This study is based on the display explosion dynamics simulation software AUTODYN to conduct simulation analysis of the propagation law of explosion shock wave pressure, analyze the height variation of the three wave point trajectory during the ammunition explosion process, and clarify that the surface reflection pressure measurement points need to be located in the Mach reflection zone, and the free field pressure measurement points need to be located above the height of the three wave points. The research results provide theoretical support for accurate testing of explosion shock wave pressure and have significant engineering application value.

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Section: Introductionmentioning

confidence: 99%

Research on the location of measurement points in explosion shock wave pressure testing

Zhong,

Wang,

Kong

et al. 2024

Vib. proced.

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“…For many decades, atmospheric sound propagation studies have been conducted predominantly on land [1][2][3][4], with only a few studies conducted over sea and small bodies of water [5]. In recent years, research on sound propagation in coastal areas has garnered increased interest, driven by the growth of off-shore wind farms [6][7][8], oil and gas platforms, offshore airport construction [9], and other activities.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Sound Propagation over Rough Sea: Numerical Evaluation of Equivalent Acoustic Impedance of Varying Sea States

Vecchiotti,

Ryan,

Vignola

et al. 2024

Acoustics

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This work presents a numerical study on atmospheric sound propagation over rough water surfaces with the aim of improving predictions of sound propagation over long distances. A method for generating pseudorandom sea profiles consistent with sea wave spectra is presented. The proposed method is suited for capturing the logarithmic nature of the energy distribution of the waves. Sea profiles representing fully developed seas for sea states 2, 3, 4, and 5 are generated from the Elfouhaily et al. (ECKV) sea wave spectra. Excess attenuation caused by refraction and surface roughness is predicted with a parabolic equation (PE) solver. A novel method for estimating equivalent effective impedance based on PE predictions at different sea states is presented. Parametric expressions using acoustic frequency and significant wave height are developed for effective surface impedances. In this work, sea surface roughness is on a scale comparable with the acoustic wavelength. Under this condition, the acoustic scattering is primarily incoherent. This work shows the limitations of using an equivalent surface impedance in such incoherent scattering cases.

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“…Previous research on sound propagation through the near-ground atmosphere (which refers, here, to altitudes up to roughly a couple hundred meters above ground level) has typically concentrated on nearly horizontal transmission paths. [1][2][3][4] However, vertical and slanted transmission paths through the near-ground atmosphere are increasingly important for a variety of timely applications, including acoustic detection and localization of small unmanned aerial vehicles (UAVs) using ground-based microphone arrays 5,6 and acoustic sensing from microphone arrays on UAVs and tethered balloons. 7 The phenomenology affecting these opposing transmission geometries differ somewhat.…”

Section: Introductionmentioning

confidence: 99%

Vertical and slanted sound propagation in the near-ground atmosphere : amplitude and phase fluctuations

Kamrath¹,

Ostashev²,

Wilson³

et al. 2021

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Sound propagation along vertical and slanted paths through the near-ground atmosphere impacts detection and localization of low-altitude sound sources, such as small unmanned aerial vehicles, from ground-based microphone arrays. This article experimentally investigates the amplitude and phase fluctuations of acoustic signals propagating along such paths. The experiment involved nine microphones on three horizontal booms mounted at different heights to a 135-m meteorological tower at the National Wind Technology Center (Boulder, CO). A ground-based loudspeaker was placed at the base of the tower for vertical propagation or 56m from the base of the tower for slanted propagation. Phasor scatterplots qualitatively characterize the amplitude and phase fluctuations of the received signals during different meteorological regimes. The measurements are also compared to a theory describing the log-amplitude and phase variances based on the spectrum of shear and buoyancy driven turbulence near the ground. Generally, the theory correctly predicts the measured log-amplitude variances, which are affected primarily by small-scale, isotropic turbulent eddies. However, the theory overpredicts the measured phase variances, which are affected primarily by large-scale, anisotropic, buoyantly driven eddies. Ground blocking of these large eddies likely explains the overprediction.

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An experimental study of the atmospheric-driven variability of impulse sounds

Cited by 20 publications

References 49 publications

Research on the location of measurement points in explosion shock wave pressure testing

Research on the location of measurement points in explosion shock wave pressure testing

Atmospheric Sound Propagation over Rough Sea: Numerical Evaluation of Equivalent Acoustic Impedance of Varying Sea States

Vertical and slanted sound propagation in the near-ground atmosphere : amplitude and phase fluctuations

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