Evaluation of wind farm noise amplitude modulation synthesis quality

Nguyen, Duc Phuc; Hansen, Kristy L.; Zajamšek, Branko; Catcheside, Peter

doi:10.1016/j.apacoust.2020.107349

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…b) The effect of the steady drip when living nearby emissions must be considered as strong factor [64], the exposure time in reality often can be (also for sensitive groups) 24/7 hours/a day. In contrast, the time in animal experimental studies is limited for practical reasons.…”

Section: Possibly Negative Support For Evidencementioning

confidence: 99%

Impairment of the Endothelium and Disorder of Microcirculation in Humans and Animals Exposed to Infrasound due to Irregular Mechano-Transduction

Bellut-Staeck

2023

JBM

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The microcirculation of mammals is an autoregulated and complex synchronised system according to the current demand for nutrients and oxygen. The undisturbed course of vital functions such as of growth, blood pressure regulation, inflammatory sequence and embryogenesis is bound to endothelial integrity. The sensible vasomotion is particularly dependent on it. Mechanotransduction signalling networks play a critical role in vital cellular processes and are the decisive physiological mechanism for an adequate NO-release, main responsible for the autoregulation of vessels. Disturbed endothelial integrity, originating, e.g., from chronic oxidative stress and/or mechanic (oscillatory) stress, leads to disturbance of vasomotion as well as a disequilibrium of redox systems, recognized as main cause for the development of chronic inflammation diseases such as atherosclerosis and corresponding secondary illnesses, possibly cancer. The endothelial cytoskeleton, which corresponds to a viscoelastic "tensegrity model", offers the possibility for mechano-transduction via its special construction. The rapidly growing knowledge about mechanical forces in cellular sensing and regulation of the last years (that culminated in the Nobel Prize award for the decoding of pressure/vibration sensing ion channels), led us to the following hypothesis: The extern stressor "Noise" produces under certain conditions an oscillatory stress field in the physiologically laminar flow bed of capillaries, which is able to lead to irregular mechano-transductions. Findings provide a strict dependence on frequency in mechano-transduction with determination of thresholds for a 1:1 transmission. The knowledge, recently gained on endothelial mechano-transduction, sheds a new light on the importance of low frequencies. This could indicate the long-sought pathophysiological way in which infrasound can exert a stressor effect at the cellular level. Noise-exposed citizens, who live near infra-How to cite this paper: Bellut-Staeck, U.M. (2023) Impairment of the Endothelium and Disorder of Microcirculation in Humans and Animals Exposed to Infrasound due to Irregular Mechano-Transduction.

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Section: Possibly Negative Support For Evidencementioning

confidence: 99%

Impairment of the Endothelium and Disorder of Microcirculation in Humans and Animals Exposed to Infrasound due to Irregular Mechano-Transduction

Bellut-Staeck

2023

JBM

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“…For instance, amplitude modulation has proven effective in laser ranging applications and plays a crucial role in the design of communication antennas [22,23]. In the field of acoustics, amplitude modulation serves as a tool for noise control, particularly in wind farm noise reduction and noise management in wind turbines [24][25][26]. In optics, it is employed in developing nonlinear optical devices for displays and holographic technologies [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Overmodulation causes a variation in the number of jumps in the Duffing system

Song,

Sun,

Han

et al. 2024

Phys. Scr.

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Amplitude modulation, involving normal and overmodulation scenarios, is crucial for information transmission. However, the complex dynamics of how modulation phase shift affects relaxation oscillations, especially under overmodulation conditions, has not been fully elucidated. Thus, this paper aims to explore the dynamical mechanism of relaxation oscillations affected by modulation phase shift under overmodulation conditions. The result shows that minor phase adjustments in low overmodulation phases can change the time series of the signal. Notably, at critical modulation phase thresholds, the number of transitions in each period of relaxation oscillations increases, and this phenomenon can be observed across a range of parameter values. However, further increase in phase will lead to the decrease in the number of transitions in relaxation oscillations, which demonstrates a clear correlation between phase adjustments and fold bifurcations affecting oscillation patterns. Based on the tri-parametric and bi-parametric bifurcation analysis, we explore the effect of overmodulation index on the number of transitions, and find that higher indices induce complex variations in it. These findings highlight the intricate interplay between modulation phase and modulation index in determining relaxation oscillation patterns, which are crucial for understanding amplitude modulation diversity and can serve as a reference for future research on other modulation scenarios.

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